I installed the Xibo docker according to the instructions at https://xibo.org.uk/docs/setup/xibo-with-docker-ubuntu-16-04 but I can not access the Xibo page, says that the user or password is incorrect. What to do?
Assuming this is fresh installation and everything went fine (ie all docker containers are up and you can access the login page), then the default credentials should be:
xibo_admin
password
If it was changed and you do not remember it, then you can alter it in the database directly.
Please see How do I reset the xibo_admin account password? and if needed also How can I run a SQL command when using a Docker Install?