SOLVED: Black screen after update. Problem with version of calendar module? Or something else?

[Klinge]

Hello,
after installing an update I got a black screen. When I start my MM with

npm start dev

I get the following warning

Starting MagicMirror: v2.2.2
Loading config ...
Loading module helpers ...
No helper found for module: alert.
No helper found for module: clock.
No helper found for module: MMM-WunderGround24Hours.
Initializing new module helper ...
Module helper loaded: calendar
WARNING! Could not load config file. Starting with default configuration. Error found: Error: Module version mismatch. Expected 50, got 54.
Loading module helpers ...
No helper found for module: alert.
No helper found for module: clock.
No helper found for module: MMM-WunderGround24Hours.
Initializing new module helper ...
Module helper loaded: calendar
App threw an error during load
Error: Module version mismatch. Expected 50, got 54.
    at Error (native)
    at process.module.(anonymous function) [as dlopen] (ELECTRON_ASAR.js:173:20)
    at Object.Module._extensions..node (module.js:583:18)
    at Object.module.(anonymous function) [as .node] (ELECTRON_ASAR.js:173:20)
    at Module.load (module.js:473:32)
    at tryModuleLoad (module.js:432:12)
    at Function.Module._load (module.js:424:3)
    at Module.require (module.js:483:17)
    at require (internal/module.js:20:19)
    at bindings (/home/pi/MagicMirror/modules/MMM-PIR-Sensor/node_modules/bindings/bindings.js:76:44)
Whoops! There was an uncaught exception...
Error: Module version mismatch. Expected 50, got 54.
    at Error (native)
    at process.module.(anonymous function) [as dlopen] (ELECTRON_ASAR.js:173:20)
    at Object.Module._extensions..node (module.js:583:18)
    at Object.module.(anonymous function) [as .node] (ELECTRON_ASAR.js:173:20)
    at Module.load (module.js:473:32)
    at tryModuleLoad (module.js:432:12)
    at Function.Module._load (module.js:424:3)
    at Module.require (module.js:483:17)
    at require (internal/module.js:20:19)
    at bindings (/home/pi/MagicMirror/modules/MMM-PIR-Sensor/node_modules/bindings/bindings.js:76:44)
MagicMirror will not quit, but it might be a good idea to check why this happened. Maybe no internet connection?
If you think this really is an issue, please open an issue on GitHub: https://github.com/MichMich/MagicMirror/issues
Launching application.

I tried some solution proposals, but unfortunately nothing helps.

It would be great, if someone could help me.

Thank you.

[Klinge]

The PIR-Module doesn’t work correctly.
I got a tip to change in the module directory and enter npm install.
I did it, the module was rebuild and so the MM works.
Thank you.