Yesterday I tried to build a couple of gpx's. Everytime I got a message saying: "Unknown error." and the job wouldn't go through.
After trying again today, I found out that the error only occurs when the box "refresh corrected coordinates" is checked. All other combinations of checkmarks works fine, and the gpx rushes through.
I've consulted the fb-group but they've never heard about this problem before, and they referred me to "support" on the website ... so here I am