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Code Fix: A workflow goes into error state when you use the Client Credentials OAuth Resource


Issue Description

When you configure a REST Service Instance to make use of the Client Credentials OAuth Resource, executing a SmartObject method from the REST Service Instance in a workflow results in an error.

Error Message

The workflow is in error state with the following error: “The method or operation is not implemented”.


The fix is available in the following K2 versions:

K2 4.7 December 2019 Cumulative Update K2 Five (5.0) December 2019 Cumulative Update K2 Five (5.1) November 2018 Cumulative Update K2 Five (5.2) May 2019 Cumulative Update K2 Five (5.3)
X X X Fix Pack 41 Fix Pack 7
  1. Ensure you have the correct K2 version and/or Cumulative Update installed. See KB001893 to see what Fix Pack level you have installed.
  2. Download the latest Fix Pack using the links in the table above for the version you require.
  3. Install the Fix Pack to apply the fix.


After installing the Fix Pack, you can use the Retry option in K2 Management for the workflow in error state.