Yo I'm still experiencing an issue where a guild won't let us upload a guild picture for it. We have two separate tags for which this is an issue. It is specific to the tags themselves, not the picture file nor the users. (Same pictures work on other tags, no pic works on these tags regardless of who is in leadership of the tag).

Emailed Toonslab report months ago, they said a developer would look into it but that was in early July and nothing's come of it