Whilst trying to activate tokenless authentication for our datanode I get an internal server error and exception.

Actions taken:

* Log into the gateway as the admin.
* Under the admin tab, follow the link 'Manage Data Access Capabilities'.
* Uncheck the 'Authorization Token Required' checkbox for the HTTP method of our datanode.
* Click the save button to persist the changes.

Result: internal server error. Use of tokens remain selected. Exception will be attached here.

NOTE The configuration of this datanode is slightly out of date:

esgcet-2.7.0
THREDDS Version 4.1.5.20100428.1434
esg.ini is hand-configured.