I'm getting the same results with multiple flash drives. Grabbed the .exe from https://www.eset.com/int/support/sysrescue/#download
As far as I can tell, it's v.1.0.14.0
After downloading the ISO, I selected the "use a previously downloaded ISO file" option and got the same results. (I'm attaching the hashes for the ISO file on the off chance that it got corrupted during download)
Does this creator leave more detailed logs anywhere that might point us in the right direction?