If WordPress application displays a blank page due to a corrupted plugin that is currently active for the application. To find the issue you should access your account via an
FTP client. Once you login in to your account through FTP you should navigate to the following folder:
path_to_your_application/wp-content/
In this wp-content folder you can find the plugins/ subfolder. This subfolder contains all plugins of your application. To disable the plugins you should rename the folder.
Afterwards test your website. If the website starts working correctly this means that one or more of your plugins are causing the issue. In order to fix it rename the plugins folder from plugins.back/ to plugins/ and open the folder itself. Then move one by one the subfolders of each plugin out of the plugins/ folder – then test your application. If the issue is resolved this means that the plugin that you have moved out has been causing all the troubles.
Then you can find the error plugin and check whether it is compatible with your version of WordPress. If you plan to use it contact the plugin’s developers and report the issue.