Silk Performer scripts will not replay on newer versions of Chrome.  The Synthetic Truelog returns the following warning

BrowserStart(BrowserEngine: 38 - Unsupported browser version, The used browser version is not officially supported. The latest supported version is xx.)

Silk Performer does not update the Chrome drivers each time that Chrome is updated.  To workaround this issue, please follow the below steps:

1.  Close the Silk Performer Workbench  

2.  Stop the Silk Launcher Service (services.msc) 

3.  Locate the correct driver version and download it from this site:  
https://chromedriver.storage.googleapis.com/index.html 

4.  Browse to: (#.# is the version of Silk Performer that is currently being used by the TEA Agent)          
\Silk\Silk Performer #.#\BrowserDrivers\WebDrivers\Windows\Chrome 
 
5.  Create a folder and name it as the version number.  Below is an example of a folder name:
77.0.3865.40    
    
6.  Copy the downloaded chrome driver executable into this newly created folder.     
    
7.  Browse to:
\Silk\Silk Performer #.#\BrowserDrivers\WebDrivers\Common\Config\Chrome 
 
8.  Open the Chrome.properties file and add mapping for the Chrome Version (Note- this file needs to be opened in Notepad as an administrator): 
i.e.:   
77=77.0.3865.40 
NOTE - The number in front of the '=' must be the same as the base version of Chrome.  For instance:
77=77.0.3865.40 
83=83.0.1234.55
87=87.0.1234.55
 
9.  Restart the Silk Performer and rerun the TryScript