Get rid of [Exception] Could not find class \XF\Template\Templater when attempting to extend XF\Template\Templater

I uninstalled an addon and something got stuck and now I have a blank screen with an error.

How to get rid of an exception like this:

Code:

An exception occurred: [Exception] Could not find class xxxxxxx\XF\Template\Templater when attempting to extend XF\Template\Templater in src/XF/Extension.php on line 200

XF version 2.2.8

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