Okta integration - missing SpKey

I’m trying to integrate Okta with rancher. I have integrated one cluster without any problems, but the other cluster immediately throws an error when I click Enable:

SAML: Cannot initialize saml SP properly, missing SpKey in the config

I have not been able to find any info indicating what may be wrong. I’ve tried re-creating the key and xml in okta several times, and verified that what I’m doing on one cluster is the same as the other.

Does anyone know what the SpKey may be referencing, or where there may be more verbose logging to determine where the issue might be?