“Please notice” error message

Hi,

Thank you for the great plugin! Postman has worked very well for my shop, however, an error message recently appeared noting a message that the plugin would not function due to an identified conflict: https://prnt.sc/1q7468u

Even after this error message appeared, emails from the site have continued to go out uninterrupted. Other steps I tried were to reconnect the gmail account that I am using to send mail (emails continued to go out), implementing the settings change recommended in the error message (the error message did not disappear), running a connectivity test from the plugin (https://prnt.sc/1q74d5h – it noted connection issues, but emails continue to go out as they always have).

So, I’m not sure if this is an issue or not, but the plugin seems to functioning fine.

How can get the error message to disappear?

Thank you!