Server blocked deploy not possible

Hello everyone .
Can anyone tell me why the server crashed?
as soon as I deploy this message appears to me.
Thanks in advance.

first time it happens to me

what should I do to restore normal operation

it happened after i was trying a counter library

Start node red in safe mode, search for server, remove it, deploy.

how do you start node-red in safe mode?

if you are not sure how to start in safe mode - as @Steve-Mcl suggested, the command is node-red --safe

You said

it happened after i was trying a counter library

Can you expand on that a bit. Did you import a flow or add or delete a node?

I imported a count node to make an hour counter then at some point the sever stopped.

Did you try startng in safe mode?

yes yes everything ok solved thanks a lot