DB Connection Error in Label

Hi, I have used the few SQL Query Expression in the templates and all are working fine. This template is used inside the faceplate. But this faceplate showing icon in the left corner.
It looks like DB Connection Error.
Since all are working well, why it is showing like this?
Any help in this will be appreciated.
Thanks in Advance,

Check the tags for it are all good quality.

All are SQL Query Tag and the values are working correctly.

Run Diagnostics on the component to see which property is the problem.