ok so i was working on my cottagecore collection and I was just making the page more pretty (changing the icon, changing the collection name's font, etc.) in order what happened was:

-i changed the icon
-i saved my progress
-i changed the collection names font (i used 2 emojis)
-i saved my progress
-i changed the collection description by copy/pasting a gif into it because (i thought at least) the format allowed it.
-i pressed the save button and it prompted the page to reload.
-the page reloaded and i got this message:

Submission not available.

Either the member choose to remove the submission, a moderator removed it or this is an invalid URL.
MEH, TO THE HOME PAGE!

could someone give me some help here? I'm not sure what happened!! :[