I’ve been trying today to set my signature image, but I’ve been met with this error each time I attempt to upload the chosen .png . Before today, the image worked just fine. Today, no dice. I just purchased a premium subscription, so I thought this issue would be a worthwhile post for tech support.
I am using MailSpring on Elementary OS 6.1.
Thanks very much for your time and help, and thanks for a great product as well!