ERROR IN LINE 17 when trying to view any map

[HtHNightwolf]

Dear dev team,

after following the install documentation, I am pretty much stuck. I am able to access ntmap, create a group and a map. But no matter what I enter in the 'Scheme' field, all I get when trying to view the map is
FEHLER: Spalte d.device_role_id existiert nicht LINE 17: ON d.device_role_id = r.id ^ HINT: Vielleicht wurde beabsichtigt, auf die Spalte »d.device_type_id« zu verweisen.

My Scheme contains two test lines only:
testnas01
testdc01
Both objects exist as devices in Netbox.

What am I supposed to enter as a scheme? A Location, a Rack, single devices? I find the usage documentation is overwhelmingly short. But I tried alot, not matter what I enter, the error message always refers to LINE 17 and never changes.

Di I have a general installation problem or am I doing something wrong while operating?

[milevskiy2]

Pls, help