In your logs, the plugin server was unreachable.
WARNING!!! Some remote endpoints cannot be reached!
Failing endpoints:
http://plugins.volumio.org, 526 ms
I just looked at mine and all endpoints are ok, so no CURRENT problems at the Volumio side:
http://plugins.volumio.org, 974 ms: OK
Maybe try again?
That is the url for the old store, the new myVolumio store is located at probably a myVolumio endpoint.
Either way, outside my prerogative, you’ll have to wait until some of the core guys who work on the myVolumio parts have a look at your log…
Before the upgrade to volumio3 everything works fine…. I tried also this morning to do a startup but always fail to reach plugin address