Freemius took a website offline

We have your plugin network active but today it took a site offline without any just cause.

The error was: TypeError thrown
Argument 1 passed to Freemius::get_api_user_scope_by_user() must be an instance of FS_User, bool given, called in /var/html/wwwroot/***/wp-content/plugins/simple-sitemap/freemius/includes/class-freemius.php on line 20787

After a lot of research we installed https://github.com/Freemius/freemius-fixer and ran it – this did nothing.

I now can’t activate your plugin without a 500 error. Please fix.