What does it mean when there is a 🚫 in an asset type picture

[clam1952]

Quick to start with.

 

[tbird8923]

I tried both, but it still didn't work

 

[tbird8923]

UPDATE: I FINALLY got the issue fixed, I had to copy the files from another grid file and into the main one, whilst changing the KUID to the one of the said file, so it's been fixed once and for all