Unable to enter code

For some reason I am unable to enter my 2fa code. My co-owner was able to get hers set up, but when I enter my code, it doesn't say whether or not it's correct or incorrect, it just says "You are not authenticated, please enter your 2fa code!" I've changed AuthMe's configuration to allow the /2fa and /auth commands before login, and as I said my co-owner was able to get hers set up. I use 2FA for a lot of things, so I'm positive I have it set up correctly on my end (I click on the link to get the temporary code, add it to GAuth and enter it). The server time is sync'd via NTP to our national time server here in Canada (time.nrc.ca) so I don't think it's the server clock being off, and anyway it doesn't tell me that the code is wrong.

Would love to get this figured out as I have to leave 2fa disabled if I want to play. I am using the default config file with only the name of our website entered, no other changes. This is Minecraft 1.12.1, Spigot server. Would be happy to provide any other data you need.