I updated from Mavericks with x2go to El Capitan, and when I did, I start seeing the following error:

Connection failed. tput: No value for $TERM

I tried moving the .x2go and .x2gocliend folders, to no avail.

My suspicion is that this has to do with global variables on the mac side not correctly propagating, but I cannot prove this.

Details: x2goclient installed via download at the top of http://wiki.x2go.org/doku.php