Installation Problem on RaspberryPi and docker

Hi there,

i’ve tried to install emonscm on my raspi in a docker-container. I’ve used this installation guide: emoncms/readme.md at master · emoncms/emoncms · GitHub
That is all fine, but in the end there is only this error message when I try to login:
Fatal error: Call to a member function fetch_row() on boolean in /var/www/emoncms/Modules/user/user_model.php on line 578

I’m not experienced with sql and so I’m not sure what’s going wrong.

I guess there is something wrong with the sql code of the installation guide!? I’ve checked the code at user_model.php. There is an select statement for table “users”. But I’ve never create a “users” table!

Hope you could help me!
Thanks!