Ok, I thought it was still using the API version, since the uploading symptoms are very very similar.
Before Rapidgator 'changed' their website uploading script (or whatever they done), all of the uploads would show 'speeds' in FIU.
However, when we switched to use the API version, speeds no longer showed - we just had to wait and hope the files uploaded, which 9 times out of 10 they didn't.
Now, since you have have fixed it... The speeds are still not showing correctly, but they are uploading, and the files 'with' speeds are failing. See screenshot below.
See here:
https://images2.imgbox.com/07/85/kKHOQ3Hn_o.jpg
I'll also send you a bunch of bug reports to go along with this.
I'll send you the bug reports for the top five files in the failed list. (just in case the errors are different?)
Thanks