While versions before 3.6.94 includes 'use Joomla\CMS\Filesystem\File;', the newer versions inlcude 'use Joomla\Filesystem\File;' in installation.php. This will break the installation of JEvents on Joomla!4 and breaks your administrator and front-end of your website.

The download page states: JEvents for Joomla 4 , 5 & 6
This is misleading / wrong.

Joomla advises to upgrade to the latest version of any extension, and that is what I did.
Based on the information on the download page, I installed 3.6.102 with bad result.

Could you please make clear on the download page that 3.6.93 is the latest version, compatible with J!4?
Then upgrade to J!5 and then upgrade to the latest JEvents package.

Thanks