[SOLVED] BASIC UI “Offline: Waiting for Connection to become available”

There are a few topics like this on the forum but none of them seem to quite be the same as my issue.

I am running a recent 2.5 snapshot.

Everything runs fine but recently when browsing the BASIC UI I get an offline error quite often. No exact timing like every minute though…

When it happens at the exact same time I see this in the log viewer…

2019-04-04 23:48:44.197 [ERROR] [e.internal.WriterInterceptorExecutor] - MessageBodyWriter not found for media type=text/event-stream, type=class org.glassfish.jersey.media.sse.OutboundEvent, genericType=class org.glassfish.jersey.media.sse.OutboundEvent.

Any thoughts on what it could be?

See here if it’s the same problem: Basic UI - continually disconnects 'waiting for server to become available'

Several attempts to delete this file and some reboots and it looks to be working again…

rm -v /var/lib/openhab2/config/org/openhab/addons.config