Mutiple classified/Trusted data error when appending two tables

Hi Sabo256w ,

Please try the solutions provided in this blog:

• The first method to fix this problem is to avoid the fnGetParameter function all together and just hard code the file paths.  While this works, you cut all dynamic capability from the query that you went to the effort of implementing.  In my opinion, this option is awful.
• If you want to preserve the dynamic nature of the fnGetParameter function, the only way to fix this error today is to perform the steps below in this EXACT order!

1. Turn on Fast Combine (Power Query –> Options –> Privacy –> Ignore Privacy Levels)
2. Save the workbook
3. Close Excel
4. Restart Excel
5. Refresh the query

Here is a similar thread:

Best Regards,
Eyelyn Qin
If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.