I installed node-red on a other Raspberry pi and from the old pi i did an export of all flows. After import of the flows on the new pi the débugnode is dead. They could be clicked on or off, but that does not work anymore.
Do i have to activatiecode something?
Well - that's most probably the cause of your trouble:
It doesn't help to disable flows with missing nodes.
If a (single) node type is missing, NR stops all flows.
As the flows aren't running, the nodes aren't running; your button press is not processed, the status change not propagated.
No it isn't. That may be the node-red version, except it would be 3.0.2.
The nodejs version can be seen by using node -v
As well as answering @ScheepersJohan's questions, can you stop node red and start it again, and post the full startup log here. Copy/paste please, not screenshot. Stop and restart using node-red-stop node-red-start
Also open the browser console (in your browser, google if you don't know how to do that), refresh the page and see if any errors shown. I think the problem may be an issue with the websocket connection to the node-red server from the browser.
[Edit] Ignore this post, it crossed with the missing nodes posts. That is undoubtedly the problem.
Regarding the nodes not installed, this warning should have popped up when you deployed a flow as I suggested.
It would have helped to tell us about it!
You can fix it via the hamburger menu | Manage Palette.
There is an install tab.
It looks like you need
very sorry not telling about it, of course no intention at all. Just ignorance. The good news is that after installing the nodes all buttons working fine again.
Many thanks to all the advisors.