Hey Peri,
Good one of your error is solved,
As you are setting this up for first time, you need to change how your planning query takes the data.
Refer the blog 
Also you should try to use RSRT transaction to check this and that is the best way to analyze the query
See in debugging mode or get a developer to check this.
Most likely it will be issue of your query trying to get the posted data instead of master data for the filter fields,
You need to change this in Query designer tool,
Hope this helps,
Regards
Rishab