I have a SharePoint farm with a web application which has both Windows Authentication and SAML claims authentication. I have the Workflow Manager 1.0 installed and configured for the farm. The workflow works fine when user is logged in via Windows Authentication, however users logging through SAML claims authentication get an error as follows:
"x-ms-diagnostics":["3001000;reason=\"There has been an error authenticating the request.\";category=\"invalid_client\""],"SPRequestGuid":["0af324ef-1559-7ef6-f92c-93a282f101ef"],"request-id":["0af324ef-1559-7ef6-f92c-93a282f101ef"]
Also the ULS has the following entry:
SPSecurityContext: Request for security token failed with exception: {0}
I have made sure the service accounts have access to User Profile Service, etc.
Appreciate if anyone has solutions.