igorblackbelt 0 Newbie Poster

We're getting this error on all computers on the domain, there were no changes done over the weekend and I can't think of any other ways of fixing it.

We can get around by right clicking on the file, send to Mail Recipient and the file gets attached, but we can't insert an attachment using the paperclip button nor by dragging and dropping a file into the body of the email.

Any suggestions on how to fix this issue?
Have you guys seen this issue before?