Error Message: Bad Request- Request Too Long.
Page cannot be display when setting up Okta for Evolve,
While setting up Okta for Evolve, you may receive the above messages. This is due to "/" (forward slash) on the Audience URI (SP Entity ID): Example https://EvolveTest/evolve/AuthServices/
Simply remove the last forward slash then save Okta, download a new Metadata.
Update Evolve and republish.
See further information on Okta setup with Evolve: