I get the following error while in DEV mode and does not matter if I have anything installed (3rd party) or not

 Whoops \ Exception \ ErrorException (E_DEPRECATED)
explode(): Passing null to parameter #2 ($string) of type string is deprecated

This happens even when I try and go to support.  I have erased the entire installation and re-installed 4.7.3 and it remains the same.  I am running PHP 8.1, any help to chase this down would be appreciated.  This is what shows up when I click on support

Well thanks for the help

Got DEBUG_TEMPLATES in your constants? Try removing it.

Thanks Nathan, appreciate the answer, that did the trick