To workaournd this situation there are two options:
Option 1: Re-Install the Extension manually form the Chrome Webstore:
For UFT 11.53 Patch 3 and above: Install the extension from: https://chrome.google.com/webstore/detail/gigfohmibpfkgmbngbmjacnmjkheedlb
For UFT 12.01 and above: Install the extension from: https://chrome.google.com/webstore/detail/jjkpkaoeaicepkfjgeeopfcfpdgblbdc
Option 2: Re-Install the Extension from UFT installation folder:
a. Open the chrome extensions page by navigating to chrome://extensions
b. Drag and drop Agent.crx which is found under %UFT_INSTALLATION_FOLDER%\bin\Chrome\ to the Chrome extensions page that was opened in Step a.
c. Chrome will ask you for confirmation to install the extension, approve the confirmation dialog.