For what I've seen the verification process works perfectly fine when using a passport. However, when using a national ID, the process fails with ERROR_NOT_READABLE_ID.
Is it possible the process expects a specific ID format? For example only U.S. (or other single country) ID or driving license? I'd guess there's no issue when using a passport because its format is more standard internationally.
If Jumio expects only some specific format, it should be clearly stated.
And unless it is corrected soon, it should also be stated that if you get it wrong, you will pay for each attempt.