I purchased this theme last year and it worked fine (version 3.0.2).
Then I was forced to renew the theme (which has been updated to version 3.0.5). That’s when trouble began.
Logging into WordPress (current version 5.9.3; PHP 7.4.29), the system crashes and locks me out of WordPress entirely. Via the command line I was able to restore to another theme to get access to WP.
In the debug and apache logs was the following error:
PHP Fatal error: Uncaught Error: Attempt to modify property “no_update” on bool in /var
It appears that AcmeTheme developers need to update the theme to play nicely with the Updates API:
Recommended usage of the Updates API to support the auto-updates UI for Plugins and Themes in WordPress 5.5
I'm not happy to have (re)bought a theme that crashes WP; buyer beware.