Problem started with email contents of emails in inbox not displaying in the bottom pane. I tried some of the suggestions in troubleshooting. Then all emails disappeared from inbox. On restarting Thunderbird or when I ask to get new messages, I now get this message : Error with account wynandkok@mweb.co.za Unable to write the email to the mailbox. Make sure the file system allows you write privileges, and you have enough disk space to copy the mailbox.

Note: the disk has 184 GB of free space.