Unable to import Extension utl-core.zip in Thingworx 9.1
I have a requirement where template "TW.RSM.Template.AssetWithTunnelsAndFileTransfer" needs to be used.
I have downloaded "MED-61116-CD-091_F000_ThingWorx-Utilities-Core-9-1-0.zip" and tried importing the same. But unable to import utl-core.zip ( All other extensions are imported successfully).
While validating extension error occurs as shown in below image. But nothing will be found in application log.

Version Details: 9.1.0
Please provide the solution to this issue.
Thank you !!

