Somehow it looks as if all my cache specifications are gone. If I go to "cache album images" I cannot select any of the themes using the checkboxes before their names and for all of the themes when I expose the cache settings for any theme all I see is one or more sets of "Invalid Cache Set" and none of those checkboxes can be selected and they are all empty.

I did attempt to create a new cache set for a theme (using add) and that was successful but when I tried to actually cache for an album using that theme with that as the only cache instruction established (all the others are "Invalid" and are empty, I get

EXCEPTION (0): "round(): Argument #1 ($num) must be of type int|float, string given" in **** removed path*****/npgCore/functions-basic.php on line 1256

How can I restore all of the former cache settings that appear to have been lost and is there a PHP 8 error lurking in there?

Thanks

NK