You cannot rename module folders. Modules are only deactivated. Downgrade PHP to 7.3.
Is the prestablog module paid or is it free? You need to find out what the error is, or contact the author of the module.
Be aware that it may take a few minutes for a programmer to fix. Communication and forum advice may not resolve the issue and may take several days to resolve. You also need to realize that we don't see what you see and we can't solve something blindly. Self-interventions can irreversibly damage the entire e-shop.