Check carefully if you have setup the pools properly as there must a difference with your AMD rig.
Otherwise let show us what your command line is or config.txt/epools.txt
I'm only using 1 card per rig, and only mining the 1 pool with each rig. This rigs are gaming PC's that I mine with when they are not in use. So for the AMD rigs, I didn't touch the epools.txt or config.txt files. There was no need. Just enter pool 1 and 2, along with the wallet, in the bat file and the AMD machines were off and running, and have been for a couple years now.
When I tried the same miner, with the same bat file configuration, on the 1660, the miner spits out this error.
This is less helpful information than you think. You are getting an error saying that your pools aren't listed properly in the config file. In order to help, we'll need to see what you're trying to do. It is quite possible that a typo could be what's holding you back. Without being able to see and confirm, I don't think anyone can give you helpful information besides telling you to update your drivers and your OS, then try restarting and see if that works... So if you want actual help, you need to provide the necessary information. In this case, that's the command line that's giving you an error.