Just sending this post to see if others affected by the same problem as of last week I've noticed, from my iOS iPhone 7, I cannot upload files into drop box. Specifically that integration seems busted which is pretty fundamental.
I get an error message stating the upload has failed the result is file icon stub with a yellow circle and a white lighting bolt through it, and a message saying the upload failed
IOS version 10.3.2 (14F89)
Boxcryptor version : 2.11.717 (717) - Premium
dropbox: Standard Account with 2FA
I've reinstalled boxcryptor which produces the same result , also I've tested other cloud providers e.g. google and onedrive etc which work okay. Seems specifically that Dropbox is broken. I've raised a support ticket no answer to date, hence I'm posting up to this forum to see if others are affected. If your affected please post a reply which might get supports attention.