Error on Scheduled Refresh: Table contains blank values

yes 
please check this doc https://docs.microsoft.com/en-us/sql/analysis-services/tabular-models/process-database-table-or-partition-analysis-services 

this will be answer for the following case 

if you get this error message "Table contains blank values"
you cleared your database and make sure there is no empty/blank values in your database 

but everytime you try to run you get this issue 

the meta data of the DB need to be refreshed 

you can update the whole DB or just the table you are working on 

To process a database

1. In SQL Server Management Studio, right-click on the database you want to process, and then click Process Database.

2. In the Process Database dialog box, in the Mode listbox, select one of the following process modes:

   Mode Description

   Process Default	Detects the process state of database objects, and performs processing necessary to deliver unprocessed or partially processed objects to a fully processed state. Data for empty tables and partitions is loaded; hierarchies, calculated columns, and relationships are built or rebuilt (recalculated).
   Process Full	Processes a database and all the objects that it contains. When Process Full is run for an object that has already been processed, Analysis Services drops all data in the object, and then processes the object. This kind of processing is required when a structural change has been made to an object. This option requires the most resources.
   Process Clear	Removes all data from database objects.
   Process Recalc	Updates and recalculates hierarchies, relationships, and calculated columns.

3. In the Process checkbox column, select the partitions you want to process with the selected mode, and then click Ok.