Appliance throwing md5sum errors

I’ve a Sangoma/Freepbx appliance here, just the small one, the 60.
Updating modules is no longer working, even at the CLI.

Here’s an example of what I get, for every module:

fwconsole ma update blacklist
No repos specified, using: [standard] from last GUI settings

Starting blacklist download..
Processing blacklist
 44612/44612 [============================] 100%
Finished downloading
The following error(s) occured:
 - File Integrity failed for /var/www/html/admin/modules/_cache/blacklist-13.0.11.tgz.gpg - aborting (md5sum did not match)

I’ve tried a few things by looking for ideas in these pages but nothing has worked.
Asterisk 11, FreePBX 13.0.98

Any help would be much appreciated.