Try to enter debug mode by following this post ->
Essentialy, using FTP Client, you have to go to /config/defines.inc.php and change this line define('_PS_MODE_DEV_', false); to this define('_PS_MODE_DEV_', true);
Sorry i forgot you have already done that 
try to comment the line it mentions 1403, or even rename phpdumper.php...
Also read this -> https://blog.floriancourgey.com/2018/04/understanding-the-cache-of-prestashop-1-7-and-symfony/
Remember Allways BACKUP first...
How did you restore to a previous version?? over the current files?? or you deleted the files than copied them back?
you should also read this ->
Best regards