Joomla 3.10.12 - not working

Hello,
I can not start Joom2Static (1.2.5) on Joomla 3.10.12. Installation is finished with succes info, later I can not go into Joom2Static component with error: Error code: 500 Internal Server Error

• The site could be temporarily unavailable or too busy. Try again in a few moments.

Is it possible to start it with Joomla 3? I need to make static copy of old site.