Jon,

I was wrong, the certificate had expired. However, I created a new self signed certificate that appears to be valid but I am getting a different certificate error:

Error executing command
javax.script.ScriptException: javax.script.ScriptException: An error occurred when running the script 'script.R', exit code: 1).
Loading required package: Matrix
Loading required package: quadprog
Loading required package: RCurl
Loading required package: bitops
Loading required package: rjson
Error in function (type, msg, asError = TRUE) :
  Issuer certificate is invalid.
Calls: labkey.selectRows ... getURI -> curlPerform -> .Call -> <Anonymous> -> fun
Execution halted

I've attached a screenshot of the Chrome window showing certificate overview.

Tom