Fixed.
It passes now...
But it means that you have a filter that have lost its field. You may have changed the table structure and removed the field linked to this filter.
The concerned filter will only show '- Select -' as null value.
When you see this filter, you can drag a new field inside or recreate it in the builder.
For your 2 empty tables, it means the datas has been lost.
Datasets in sandboxes are still not stable.
Almost all thoses problems comes because you have renamed fields in table, or recreated the structure when the layouts was done. This is possible of course, but it still lacks a little bit. When you first design well your database structure, then you have no problem with the layouts.
Adding fields in table is always possible, only removing them can cause problems sometimes.
Really sorry. I am staying highly active on the forum this week. So it is the moment to post all issues you can have. I will try to be as reactive as possible.