Hello.
Have you updated NodeJS-Pushserver according to this guide?
[URL=https://training.bitrix24.com/support/training/course/?COURSE_ID=113&LESSON_ID=9633]https://training.bitrix24.com/support/training/course/?COURSE_ID=113&LESSON_ID=9633[/URL]
[QUOTE]Attention! Task execution may take a rather long time (up to 2-3 hours and more)[/QUOTE]
When the update is complete, the correct values ("Signature code for server interaction" and others) will be automatically specified in the Push and Pull module settings (local push server option).
If you have changed the module settings before updating NodeJS-Push server, try to reset the Push and Pull module settings to defaults after the update is complete.