After upgrading GitHub OAuth plugin 0.31->0.32 I had errors at the Matrix-based security interface (Manage Jenkins->Configure Global Security)

"ERROR" instead of users names.

Click on "ERROR" show full error message:

HTTP ERROR 403

Problem accessing /jenkins/descriptorByName/hudson.security.GlobalMatrixAuthorizationStrategy/checkName. Reason:

Forbidden

I can't add new user. After "applay" i had error page":

HTTP ERROR 403

Problem accessing /jenkins/configureSecurity/configure. Reason:

No valid crumb was included in the request

Authentication itself work well.