Currently ABPro does not run under the current Joomla 4.

Significant re-coding will be required to get ABPro to run under Joomla 4.

This work is progressing well. 

 

I cannot guarantee that all current ABPro functionality will work in Joomla 4.

 

 

See an early ABPro 4.0.5 running under Joomla 4.0 Alpha 5 here