Instance Web API not working

Hi,

One of our dev environments is not responding to the Service Root URL that is available in developer resources.

My script which uses odata stopped working and no matter what I do, the script fails to respond to the odata url. That lead me to look at the url that is in developer resources. I tried running this url in the browser and fails to load throwing 'An error has occurred' error. No other information, that's it.

Interestingly our prod and test environments are working fine. The odata url in developer resources are working fine totally fine.

This looks like my dev environment broken or something! Is that right to think so? Has anybody experienced this? How do I troubleshoot further?

Please let me know. I do not want to do my deployments from dev and introduce the bug into other environments.

Thank you.