The Old Man again. Got the message the EC tack is not install. Check my stacks panel and “is there”. Put an extra one below. Check the stacks in the finder and “is there”. I am I going crazy? Please help.
Looks like you’ve used two different ExtraContent stacks. The one at the bottom matches the one you have installed, which is the standard ExtraContent stack. The one at the top seems to be a specialized ExtraContent stack by @1LittleDesigner it seems. You’ll want to re-download that one and re-install it.