Hi,
> Hi, this isn't a PHP issue...
It's a nice peremptory statement without any verification.
You didn't go to php_error.log or apache_error.log and you didn't do what I recommended even just to try.
A complete re-installation requires first the backup of your local sites if they are in the Wampserver tree structure ¹ and the export of your databases as SQL files ².
¹ VirtualHost allows to have local sites anywhere outside the Wampserver tree structure
² MySQL and MariaDB can use databases located outside the data folders.
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Documentation Apache -
Documentation PHP -
Documentation MySQL -
Wampserver install files & addons