php 8.0.16 mysql 8.0.28 fpm-fcgi joomla 3.10.6 pagebuilder 2.8.3 helixUltimate 2,0,7

If I revert to php 7.4 the indexer successfully runs. 8.0 no go. I do see some archived questions on this but it appears that you support PHP 8 correct?

watching the "inspected network"activity I eventulally get a response status of 500 with a uncaught syntaxerror: unexpected token < in JSON at position 0

I set as recommended the error messages to max...didn't see much but may have missed something.

Ideas?