webpagetest private instance - getting http500 error on results


I am using webpagetest private instance hosted in AWS, using public AMI. Enabled auto-update of code in settings.

From 28th September 2021, I am facing error in views results. i.e., getting http 500 error on viewing results.
ex : http://wptdomain/result/resultID → http 500

I didn’t see any details in logs. Any suggestions to resolve this issue?