Summary
Dynatrace stores browser monitor screenshots in Amazon S3. If you can't see your reference or error screenshots, either your ActiveGate or the browser from which you access Dynatrace can't access the S3 service.
Resolution
Change your firewall configuration to allow connections to:
ruxit-synth-screencap.s3-accelerate.amazonaws.com for screenshot storage.ruxit-synth-screencap.s3.amazonaws.com for screenshot access and viewing.
You can also set up your proxy to connect to the Amazon S3 service. Add proxy connection details to the [synthetic] section of the ActiveGate custom.properties file. For more information, see Set up a proxy for private synthetic monitoring.
What's Next
There's more in-depth information on troubleshooting this issue in this Community article on missing screenshots.
You can find further troubleshooting tips for Synthetic in the Synthetic Troubleshooting Map
