Blank Page After Deleting the cache

Hello there,, I have been having this issue since i have updated wordpress to 5.0.3 , I clicked on clear cache, and then the front end site went completely blank, I deleted the plugin, and still the front end is blank, I tried all possible solutions after Enabling Debugging Mode in wp.config, and fixed all irrelevant messages that appeared on the blank page till there was no error messages left, I Restored the whole Damn Site from a back up that i had 3 weeks ago which have wordpress v 5.0.1 and Wp Fastest Cache working, the front worked,then i tested the plugin and cleared all cache without upgrading wpress or any plugin, the front end went back “Blank” again, i even cleaned the “.htaccess” file and wp.cofig from any left overs, and even deleted the whole cache folder in wp-content but with no any success, I called my hosting company, and they ran tests of their own, and did what they could and then replied to me that there is a problem with a plugin called wp-fastest cache……I Don’t want to start the whole site from Zero.Like i said, I restore from a back up i have, The front end worked properly, but when i cleared the cache using Wp-Fastest Cache, The front end Site Goes “Blank” Again,And I Have to clear the cache so any changes i make can show up on the front end. Deleting the plugin didn’t help, reinstalling and activating the plugin didn’t help, restoring the whole site didn’t help. Help me please

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