Did you change the mysql container database name, username and password to something other than the default linguacafe ?
That would break it, as it’s using those specific credentials to login to the database. Which would cause Access denied for user ‘linguacafe’@‘ip adress censored’ (using password: YES) (SQL: select count(*) as aggregate from users)
Try with the default, you’ll need to wipe the mysql data under /home/user/Documents/Docker/LinguaCafe/database/ after stopping the container first.