Fontbase stopped auto-updating since v 2.19.1 and apparently is giving me an automatic message of being unable to update after I manually updated it to the latest version.
I’m having the exact same problem. Hopefully someone at Fontbase will figure out what’s going on soon & let us know.
Hello @fcunhaster, @letsscrap, thank you for bringing this up 
We’ve just posted a message regarding the solution to this here:
https://forum.fontba.se/t/solution-could-not-download-update-after-v2-19-1
Thank you again,
Yuriy
FontBase Dev Team