![OJS 3307 - An unexpected error has occurred. + Array to string conversion in ../core/PKPString.inc.php on line 421 - Software Support - PKP Community Forum OJS 3307 - An unexpected error has occurred. + Array to string conversion in ../core/PKPString.inc.php on line 421 - Software Support - PKP Community Forum](https://forum.pkp.sfu.ca/uploads/default/original/3X/b/e/be4f89a6c89888b89e15f9fec2d995f039e3a008.jpeg)
OJS 3307 - An unexpected error has occurred. + Array to string conversion in ../core/PKPString.inc.php on line 421 - Software Support - PKP Community Forum
![An exception has been thrown during the rendering of a template ("Array to string conversion") after upgrade - Themes & Styling - Grav Community Forum An exception has been thrown during the rendering of a template ("Array to string conversion") after upgrade - Themes & Styling - Grav Community Forum](https://aws1.discourse-cdn.com/standard10/uploads/getgrav/optimized/2X/f/f37cb61680068288b013952ebf06e046e93fca19_2_1024x720.png)
An exception has been thrown during the rendering of a template ("Array to string conversion") after upgrade - Themes & Styling - Grav Community Forum
PHP CodeIginter Error : Message: Array to string conversion · Issue #1497 · googleapis/google-api-php-client · GitHub
![OJS 3307 - An unexpected error has occurred. + Array to string conversion in ../core/PKPString.inc.php on line 421 - Software Support - PKP Community Forum OJS 3307 - An unexpected error has occurred. + Array to string conversion in ../core/PKPString.inc.php on line 421 - Software Support - PKP Community Forum](https://forum.pkp.sfu.ca/uploads/default/original/3X/9/8/98886f2979db0eaebed1bd4268f0d5aefdde4d95.jpeg)