TablePlus not connecting to Forge (SequelPro is fine)

Hi,

I've just updated to Catalina 10.15.4 (clean install). TablePlus worked fine for me in Mojave, but now won't connect.

I've set up my SSH keys and can SSH in on the command line, no problem. I can also connect via SequelPro perfectly. TablePlus, however, will pass 'test connection' but when it gets to 'authenticating' just hangs and eventually fails.

Is this a Catalina thing?