ojs2 has produced an error
  Message: WARNING: imagefttext(): Could not find/open font
  In file: /var/www/html/ojs/lib/pkp/classes/captcha/CaptchaManager.inc.php
  At line: 98
  Stacktrace: 
   File: (unknown) line (unknown)
     Function: PKPApplication->errorHandler(2, "imagefttext(): Could not find/open font", "/var/www/html/ojs/lib/pkp/classes/captcha/CaptchaManager.inc.php", 98, Array(11))
   File: /var/www/html/ojs/lib/pkp/classes/captcha/CaptchaManager.inc.php line 98
     Function: imagefttext(Resource(), 22, -14, 77, 60, 9032625, "https://www.google.com/recaptcha/api/siteverify", "N")
   File: /var/www/html/ojs/plugins/generic/thesis/ThesisHandler.inc.php line 227
     Function: CaptchaManager->generateImage(Object(Captcha))
   File: (unknown) line (unknown)
     Function: ThesisHandler->viewCaptcha(Array(1), Object(Request))
   File: /var/www/html/ojs/lib/pkp/classes/core/PKPRouter.inc.php line 362
     Function: call_user_func(Array(2), Array(1), Object(Request))
   File: /var/www/html/ojs/lib/pkp/classes/core/PKPPageRouter.inc.php line 220
     Function: PKPRouter->_authorizeInitializeAndCallRequest(Array(2), Object(Request), Array(1), False)
   File: /var/www/html/ojs/lib/pkp/classes/core/Dispatcher.inc.php line 134
     Function: PKPPageRouter->route(Object(Request))
   File: /var/www/html/ojs/lib/pkp/classes/core/PKPApplication.inc.php line 178
     Function: Dispatcher->dispatch(Object(Request))
   File: /var/www/html/ojs/index.php line 69
     Function: PKPApplication->execute()
  Server info:
   OS: Linux
   PHP Version: 5.6.40-81+ubuntu24.04.1+deb.sury.org+1
   Apache Version: Apache/2.4.58 (Ubuntu)
   DB Driver: mysqli
   DB server version: 10.11.13-MariaDB-0ubuntu0.24.04.1<br/>
ojs2 has produced an error
  Message: WARNING: imagefttext(): Could not find/open font
  In file: /var/www/html/ojs/lib/pkp/classes/captcha/CaptchaManager.inc.php
  At line: 98
  Stacktrace: 
   File: (unknown) line (unknown)
     Function: PKPApplication->errorHandler(2, "imagefttext(): Could not find/open font", "/var/www/html/ojs/lib/pkp/classes/captcha/CaptchaManager.inc.php", 98, Array(11))
   File: /var/www/html/ojs/lib/pkp/classes/captcha/CaptchaManager.inc.php line 98
     Function: imagefttext(Resource(), 31, -5, 111, 40, 9032625, "https://www.google.com/recaptcha/api/siteverify", "2")
   File: /var/www/html/ojs/plugins/generic/thesis/ThesisHandler.inc.php line 227
     Function: CaptchaManager->generateImage(Object(Captcha))
   File: (unknown) line (unknown)
     Function: ThesisHandler->viewCaptcha(Array(1), Object(Request))
   File: /var/www/html/ojs/lib/pkp/classes/core/PKPRouter.inc.php line 362
     Function: call_user_func(Array(2), Array(1), Object(Request))
   File: /var/www/html/ojs/lib/pkp/classes/core/PKPPageRouter.inc.php line 220
     Function: PKPRouter->_authorizeInitializeAndCallRequest(Array(2), Object(Request), Array(1), False)
   File: /var/www/html/ojs/lib/pkp/classes/core/Dispatcher.inc.php line 134
     Function: PKPPageRouter->route(Object(Request))
   File: /var/www/html/ojs/lib/pkp/classes/core/PKPApplication.inc.php line 178
     Function: Dispatcher->dispatch(Object(Request))
   File: /var/www/html/ojs/index.php line 69
     Function: PKPApplication->execute()
  Server info:
   OS: Linux
   PHP Version: 5.6.40-81+ubuntu24.04.1+deb.sury.org+1
   Apache Version: Apache/2.4.58 (Ubuntu)
   DB Driver: mysqli
   DB server version: 10.11.13-MariaDB-0ubuntu0.24.04.1<br/>
ojs2 has produced an error
  Message: WARNING: imagefttext(): Could not find/open font
  In file: /var/www/html/ojs/lib/pkp/classes/captcha/CaptchaManager.inc.php
  At line: 98
  Stacktrace: 
   File: (unknown) line (unknown)
     Function: PKPApplication->errorHandler(2, "imagefttext(): Could not find/open font", "/var/www/html/ojs/lib/pkp/classes/captcha/CaptchaManager.inc.php", 98, Array(11))
   File: /var/www/html/ojs/lib/pkp/classes/captcha/CaptchaManager.inc.php line 98
     Function: imagefttext(Resource(), 27, -15, 142, 58, 9032625, "https://www.google.com/recaptcha/api/siteverify", "h")
   File: /var/www/html/ojs/plugins/generic/thesis/ThesisHandler.inc.php line 227
     Function: CaptchaManager->generateImage(Object(Captcha))
   File: (unknown) line (unknown)
     Function: ThesisHandler->viewCaptcha(Array(1), Object(Request))
   File: /var/www/html/ojs/lib/pkp/classes/core/PKPRouter.inc.php line 362
     Function: call_user_func(Array(2), Array(1), Object(Request))
   File: /var/www/html/ojs/lib/pkp/classes/core/PKPPageRouter.inc.php line 220
     Function: PKPRouter->_authorizeInitializeAndCallRequest(Array(2), Object(Request), Array(1), False)
   File: /var/www/html/ojs/lib/pkp/classes/core/Dispatcher.inc.php line 134
     Function: PKPPageRouter->route(Object(Request))
   File: /var/www/html/ojs/lib/pkp/classes/core/PKPApplication.inc.php line 178
     Function: Dispatcher->dispatch(Object(Request))
   File: /var/www/html/ojs/index.php line 69
     Function: PKPApplication->execute()
  Server info:
   OS: Linux
   PHP Version: 5.6.40-81+ubuntu24.04.1+deb.sury.org+1
   Apache Version: Apache/2.4.58 (Ubuntu)
   DB Driver: mysqli
   DB server version: 10.11.13-MariaDB-0ubuntu0.24.04.1<br/>
ojs2 has produced an error
  Message: WARNING: imagefttext(): Could not find/open font
  In file: /var/www/html/ojs/lib/pkp/classes/captcha/CaptchaManager.inc.php
  At line: 98
  Stacktrace: 
   File: (unknown) line (unknown)
     Function: PKPApplication->errorHandler(2, "imagefttext(): Could not find/open font", "/var/www/html/ojs/lib/pkp/classes/captcha/CaptchaManager.inc.php", 98, Array(11))
   File: /var/www/html/ojs/lib/pkp/classes/captcha/CaptchaManager.inc.php line 98
     Function: imagefttext(Resource(), 21, -9, 172, 43, 9032625, "https://www.google.com/recaptcha/api/siteverify", "3")
   File: /var/www/html/ojs/plugins/generic/thesis/ThesisHandler.inc.php line 227
     Function: CaptchaManager->generateImage(Object(Captcha))
   File: (unknown) line (unknown)
     Function: ThesisHandler->viewCaptcha(Array(1), Object(Request))
   File: /var/www/html/ojs/lib/pkp/classes/core/PKPRouter.inc.php line 362
     Function: call_user_func(Array(2), Array(1), Object(Request))
   File: /var/www/html/ojs/lib/pkp/classes/core/PKPPageRouter.inc.php line 220
     Function: PKPRouter->_authorizeInitializeAndCallRequest(Array(2), Object(Request), Array(1), False)
   File: /var/www/html/ojs/lib/pkp/classes/core/Dispatcher.inc.php line 134
     Function: PKPPageRouter->route(Object(Request))
   File: /var/www/html/ojs/lib/pkp/classes/core/PKPApplication.inc.php line 178
     Function: Dispatcher->dispatch(Object(Request))
   File: /var/www/html/ojs/index.php line 69
     Function: PKPApplication->execute()
  Server info:
   OS: Linux
   PHP Version: 5.6.40-81+ubuntu24.04.1+deb.sury.org+1
   Apache Version: Apache/2.4.58 (Ubuntu)
   DB Driver: mysqli
   DB server version: 10.11.13-MariaDB-0ubuntu0.24.04.1<br/>
ojs2 has produced an error
  Message: WARNING: imagefttext(): Could not find/open font
  In file: /var/www/html/ojs/lib/pkp/classes/captcha/CaptchaManager.inc.php
  At line: 98
  Stacktrace: 
   File: (unknown) line (unknown)
     Function: PKPApplication->errorHandler(2, "imagefttext(): Could not find/open font", "/var/www/html/ojs/lib/pkp/classes/captcha/CaptchaManager.inc.php", 98, Array(11))
   File: /var/www/html/ojs/lib/pkp/classes/captcha/CaptchaManager.inc.php line 98
     Function: imagefttext(Resource(), 21, 6, 205, 47, 9032625, "https://www.google.com/recaptcha/api/siteverify", "4")
   File: /var/www/html/ojs/plugins/generic/thesis/ThesisHandler.inc.php line 227
     Function: CaptchaManager->generateImage(Object(Captcha))
   File: (unknown) line (unknown)
     Function: ThesisHandler->viewCaptcha(Array(1), Object(Request))
   File: /var/www/html/ojs/lib/pkp/classes/core/PKPRouter.inc.php line 362
     Function: call_user_func(Array(2), Array(1), Object(Request))
   File: /var/www/html/ojs/lib/pkp/classes/core/PKPPageRouter.inc.php line 220
     Function: PKPRouter->_authorizeInitializeAndCallRequest(Array(2), Object(Request), Array(1), False)
   File: /var/www/html/ojs/lib/pkp/classes/core/Dispatcher.inc.php line 134
     Function: PKPPageRouter->route(Object(Request))
   File: /var/www/html/ojs/lib/pkp/classes/core/PKPApplication.inc.php line 178
     Function: Dispatcher->dispatch(Object(Request))
   File: /var/www/html/ojs/index.php line 69
     Function: PKPApplication->execute()
  Server info:
   OS: Linux
   PHP Version: 5.6.40-81+ubuntu24.04.1+deb.sury.org+1
   Apache Version: Apache/2.4.58 (Ubuntu)
   DB Driver: mysqli
   DB server version: 10.11.13-MariaDB-0ubuntu0.24.04.1<br/>
ojs2 has produced an error
  Message: WARNING: imagefttext(): Could not find/open font
  In file: /var/www/html/ojs/lib/pkp/classes/captcha/CaptchaManager.inc.php
  At line: 98
  Stacktrace: 
   File: (unknown) line (unknown)
     Function: PKPApplication->errorHandler(2, "imagefttext(): Could not find/open font", "/var/www/html/ojs/lib/pkp/classes/captcha/CaptchaManager.inc.php", 98, Array(11))
   File: /var/www/html/ojs/lib/pkp/classes/captcha/CaptchaManager.inc.php line 98
     Function: imagefttext(Resource(), 34, 2, 230, 41, 9032625, "https://www.google.com/recaptcha/api/siteverify", "4")
   File: /var/www/html/ojs/plugins/generic/thesis/ThesisHandler.inc.php line 227
     Function: CaptchaManager->generateImage(Object(Captcha))
   File: (unknown) line (unknown)
     Function: ThesisHandler->viewCaptcha(Array(1), Object(Request))
   File: /var/www/html/ojs/lib/pkp/classes/core/PKPRouter.inc.php line 362
     Function: call_user_func(Array(2), Array(1), Object(Request))
   File: /var/www/html/ojs/lib/pkp/classes/core/PKPPageRouter.inc.php line 220
     Function: PKPRouter->_authorizeInitializeAndCallRequest(Array(2), Object(Request), Array(1), False)
   File: /var/www/html/ojs/lib/pkp/classes/core/Dispatcher.inc.php line 134
     Function: PKPPageRouter->route(Object(Request))
   File: /var/www/html/ojs/lib/pkp/classes/core/PKPApplication.inc.php line 178
     Function: Dispatcher->dispatch(Object(Request))
   File: /var/www/html/ojs/index.php line 69
     Function: PKPApplication->execute()
  Server info:
   OS: Linux
   PHP Version: 5.6.40-81+ubuntu24.04.1+deb.sury.org+1
   Apache Version: Apache/2.4.58 (Ubuntu)
   DB Driver: mysqli
   DB server version: 10.11.13-MariaDB-0ubuntu0.24.04.1<br/>
ojs2 has produced an error
  Message: WARNING: Cannot modify header information - headers already sent by (output started at /var/www/html/ojs/lib/pkp/classes/core/PKPApplication.inc.php:381)
  In file: /var/www/html/ojs/lib/pkp/classes/captcha/CaptchaManager.inc.php
  At line: 113
  Stacktrace: 
   File: (unknown) line (unknown)
     Function: PKPApplication->errorHandler(2, "Cannot modify header information - headers already sent by (output started at /var/www/html/ojs/lib/pkp/classes/core/PKPApplication.inc.php:381)", "/var/www/html/ojs/lib/pkp/classes/captcha/CaptchaManager.inc.php", 113, Array(13))
   File: /var/www/html/ojs/lib/pkp/classes/captcha/CaptchaManager.inc.php line 113
     Function: header("Content-type: image/png")
   File: /var/www/html/ojs/plugins/generic/thesis/ThesisHandler.inc.php line 227
     Function: CaptchaManager->generateImage(Object(Captcha))
   File: (unknown) line (unknown)
     Function: ThesisHandler->viewCaptcha(Array(1), Object(Request))
   File: /var/www/html/ojs/lib/pkp/classes/core/PKPRouter.inc.php line 362
     Function: call_user_func(Array(2), Array(1), Object(Request))
   File: /var/www/html/ojs/lib/pkp/classes/core/PKPPageRouter.inc.php line 220
     Function: PKPRouter->_authorizeInitializeAndCallRequest(Array(2), Object(Request), Array(1), False)
   File: /var/www/html/ojs/lib/pkp/classes/core/Dispatcher.inc.php line 134
     Function: PKPPageRouter->route(Object(Request))
   File: /var/www/html/ojs/lib/pkp/classes/core/PKPApplication.inc.php line 178
     Function: Dispatcher->dispatch(Object(Request))
   File: /var/www/html/ojs/index.php line 69
     Function: PKPApplication->execute()
  Server info:
   OS: Linux
   PHP Version: 5.6.40-81+ubuntu24.04.1+deb.sury.org+1
   Apache Version: Apache/2.4.58 (Ubuntu)
   DB Driver: mysqli
   DB server version: 10.11.13-MariaDB-0ubuntu0.24.04.1<br/>
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