A google search via that error message leads to
downloaders using jdownloader are getting the same error message
https://board.jdownloader.org/showthread.php?t=46495
Depositfiles have had a purge perhaps on existing files as well,possibly?
We know that they've changed their policies towards DMCA notices not long ago 13.3.2017
4 DMCA strikes and your account is blocked
There Wjunction thread hints at issues - delayed payments to uploaders mid March
and accounts blocked / contents deleted / closed due to DMCA
http://www.wjunction.com/102-file-ho...24652-334.html
Its all speculation