Basic UI - continually disconnects 'waiting for server to become available'

I do also see the WARN messages a posted by @jfrank1845, see Here

I’m observing high CPU loads, delayed performed rules, UIs temporarily unavailable, items reacting late or not at all etc…

Does this relate to Github issue?

[Edit:] Solved by deleting : /var/lib/openhab2/config/org/openhab/addons.config