There was an error with the spam functionnality

[lmirguet]

Describe the bug Very often (but not always) when I select one or several emails in the spam folder and I mark them all as "Not Spam" I get an error message "There was an error with the spam functionnality"

To Reproduce Steps to reproduce the behavior:

1. Go to Spam folder
2. Select several emails
3. Mark them as not spam

Expected behavior There should not be an error, and the spam filter should be trained.

[gtandersen]

Thanks for the report @lmirguet -- we'll look into it.