wartKomorki is a DataTable variable type. So if you want to store the entire table you need to use Read Range activity.
If you want to use the Read Cell then you can delete the Assign, cause wartKOMout is already the text you want to use in the TypeInto.
So simple way would be to delete that Assign activity, cause the Read Cell stores the text to wartKOMout already to be used in the TypeInto.
Depending on what you are wanting to do, however, using a Read Range to store the table to the DataTable variable might be useful for looping through each row.
Which variable is your output of the read cell activity? Because if it’s the datatable variable, you’ll need to change it to the string variable if you’re only readying 1 cell.
wartOUT is a String, so put that variable in the Output property of the Read Cell.
Then, in the message box put wartOUT.ToString
If you do choose to use Read Range where you show above where you have “Column1”, you don’t need the Output Data Table activity. Instead, in the Message box just put wartKOM.Rows(0).Item(0).ToString.
That will output the first row of the table and first item. If you want a different item, change the 0 to a different number.