Clarity PPM: API documentation URL throwing error

Products

• Clarity PPM SaaS
• Clarity PPM On Premise

Issue/Introduction

When trying to access the below API documentation URL, it throws an error

https://<hostname>/niku/rest/describe/index.html

Error: failed to parse JSON/YAML response

Environment

Clarity : 15.9.3, 16.0.x, 16.1.x, 16.2.x, 16.3.2

Resolution

Often this can be resolved by simply flushing the Clarity caches:

Flush the Clarity PPM caches

If this doesn't resolve the issue, a restart of the app server may be necessary.