My uploads keep getting stuck

I like the Unreal plugin, and we want to buy a membership for the ION to get more storage,
but my uploads keep getting stuck and not getting support://
I tried getting an answer here: Tiling process stuck
in the meanwhile tried uploading a different model, which is now also frozen (1440678) in 9%
Am I missing something?
Please advise; I genuinely want to use this great solution.