This seems to be an error in either the product in which you invoked the Tag Search or with the installation/configuration of the various PI components. This should really be addressed with Tech Support.
Tech Support will require asome further information to help diagnose your issue, so providing it from the outset will expediate the process. you should email firstname.lastname@example.org the following information and they will respond suprisingly fast!
- Description of the error.
- What product invoked the error.
- Exact error messages.
- Procedure to reproduce the error.
- Screenshots or configuration files relevant to the issue.
- Any Log files.
- Version information for the products involved.