Hi Thomas,
In the above screenshots in Dimensions tab I can not see that you have mapped the value column to any of the field. Please check this point. Also check the primary key, how you have define it.
Check the default value setting for each column.
One you check all the above mentioned points then check for the MDO table which is mentioned in your error(MDO91686) in MII internal database and check if has some data or not. Try to query that table and see if still you get the error or not.
Please let me know if you face any issue.
Thanks,
Ritim