Embedded Images Missing in Email Body

Hello.

Using version 8.1.1021 (adce13c). Today I sent an email with several screenshots embedded in the email, which usually works quite well, but when the recipient received it, the images were gone.

I could see them in my Sent message, but was not able to save or copy them (some error message).

I restarted eM Client, and now images from ALL of my emails are missing…

Is this some configuration issue? Any idea what is happening and how I can resolve this?

Thanks!