I have this exact same problem. If someone invites me to a meeting and I accept it. It works fine. If they make an update to the meeting and I try to accept it, I get that error message.
Hi Kendra, sorry to see this, what version of eM Client are you currently using on your computer? Can you please check for the exact version number in Help > About? What mail service are you using with eM Client?
Can you make a screenshot of the error and submit it to us here on the forum?
Paul - I am using version 6.0.21372.0 of eM Client. Here’s the screenshot of the error message. This error shows up when I try to click Accept for a meeting invitation. This didn’t used to happen. When I go to my calendar, the meeting appears, but it doesn’t show my reply (attending, declined, tentative, etc.), so I have to then find it on my calendar, open it up, and update the Participation Status manually.
Hi again Kendra, thank you for reporting this, I’ve reported the issue to the developers and they’re working on a solution for this issue, however no update is available yet.
I’m sorry for any inconvenience caused, I’ll check back with you as soon as possible.