The hub received an HTTP error response (e.g.: 500) from an adapter.
The web server at the adapter is working well enough to send an error response, but has some problem that must be fixed by that adapter's admin before SHRINE can properly operate.
If you are a user or an admin, please supply all details to the admin for the node that responded with this error.
This problem is often caused by a syntax error in the adapter site's shrine.conf. In this case, Tomcat starts fine and can respond, but any attempts to access the SHRINE application itself (which is separate from the webclient) will result in a fatal error.