I have an only slightly annoying workaround here:
When i go to attach a file, it takes me to the connected Dropbox, there is a square of little arrows on the right. When i click a file name, it starts to attach, but then i get the "can't attach" message. Same problem everyone is having, which started for me maybe 2 weeks ago.
If i click on the top-left hamburger instead of the desired file, i go back to the "open from" menu. Dropbox is a choice. If i click on the left side of the choice, it takes me back to the previous Dropbox. **But if i click on the RIGHT side, ** after the small vertical bar, on the little box with the arrow in it, it takes me to a different Dropbox menu, where i can SELECT the file i want by clicking a BOX next to the filename, then click the check mark at the top after the selection. The program says "downloading" (not to the download folder, but i don't know where) and attaches the file to the email. Send and done.
I'm sure the file gets downloaded somewhere, so that this solution is the same as first downloading the file and then second attaching it to the email, but it automatically attaches, i don't have to search or open another directory.... so this is good enough for me.
