As title says, I have been unable to upload a branding image for my small collection of maps, which just makes it look uninteresting when I post links to it here. All I want is the same logo as my profile has (for now). I always do standard square images, I have tried different formats, different images entirely, it just keeps saying it has failed and to try again later.

I contacted steam support, and whilst they have an option to ask about workshop issues, if you choose that option they will wait just about forever before telling you:
"Steam Support does not offer technical assistance with the Steam Workshop or user made content."

Incredibly helpful...

I wondered if anyone could possibly help figure out the problem here? The collection in question is this: https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=74275560

Also feel free to play those maps. I haven't made any in a while and intend to do so when I have made a dent in my coursework this year, but I am quite pleased with them nonetheless.

Thanks for any help and advice, can't be any worse than steam support ;P