Occasionally, when I attempt to send a picture/photo via Messages on my iMac, I get an error message of “message failed to send” and I have no idea why. In this instance, the photo is very small (about 430 kb), and is being sent to another iPhone user. In fact, it’s failed for sending to 2 different iPhone users. I’ve rebooted my iMac and my iPhone, but that hasn’t resolved the issue. I can send text messages with no issues.
MacOS 10.15.7, Message v13.0, iOS 14.4 - connected via ethernet (and WiFi) to the internet via fiber.
Any thoughts or suggestions for fixing the issue?