The thing is that Nanopool is optimized for multi GPU/CPU RIGs, that means while mining with a single GPU/CPU or low-efficient one,
you'll receive a false-positive notification each time your miner does not manage to send a valid share to the pool for 20 minutes.


If this is the case, you can simply replace your email in the miner configuration with a passphrase that will be your new password for your account settings.


I hope this helps!