I’m having the same issue when trying to use convertkit with zapier. I put in the API Secret and tested before turning on the zap. The test was successful. When I turn on the zap I then receive the error message invalid API secret reauthorize. I’ve recreated it several times ensuring their are not any spaces and thetest is successful. Please help! I would like to have my first zap up and running soon!
Thanks,
Vernell