Migrating to 2.5 is a pain.
I finally got the controller installed on a Raspberry pi.
I created a NEW configuration on the 2.5 designer. (took me a while because exporting from 2.1 was a pain too…)
Unable to from the 2.5 designer export as zip (still the 500 error as in attachment), unable to sync online (authentication problem although I added mac address of my controller and use the correct login credentials of my 2.5 designer).
Somewhere in August 2016 I already mentioned my username having error 500 issues in a google group discussion…
Is there something I’m missing?