Error: Your Constant Contact username or password are not correct.

[ghost]

I recently installed this plugin, it worked fine for 2 days, however today I'm getting this message:
Error: Your Constant Contact username or password are not correct.
I have checked the login info many times and it hasn't changed. I re-entered and I still get the same message. I even created a new user on Constant Contact, however same message. What could be causing this? any input helps! thx

[rocarly25]

Hi! The same here but didn't work for me since first time I set the Constant Contact credentials. I already had updated the plugins and WordPress but the error still there. I'm able to login with my user and password in Constant Contact, so the user and password are not the problem. Error: Your Constant Contact username or password are not correct.

Thanks in advance!