problems with starting

[Karalica-Kir]

0|mm  | Whoops! There was an uncaught exception...
0|mm  | [2021-03-26 12:14:51.687] [ERROR]
0|mm  | SyntaxError: Unexpected end of JSON input
0|mm  |     at JSON.parse (<anonymous>)
0|mm  |     at Class.getStyleMap (/home/pi/MagicMirror/modules/MMM-GoogleMapsTraffic/node_helper.js:37:46)
0|mm  |     at Class.socketNotificationReceived (/home/pi/MagicMirror/modules/MMM-GoogleMapsTraffic/node_helper.js:22:52)
0|mm  |     at Socket.<anonymous> (/home/pi/MagicMirror/js/node_helper.js:113:11)
0|mm  |     at Socket.emit (events.js:200:13)
0|mm  |     at /home/pi/MagicMirror/node_modules/socket.io/lib/socket.js:528:12
0|mm  |     at processTicksAndRejections (internal/process/task_queues.js:82:9)

[lavolp3]

@karalica-kir
A bit more explanation around all this would be helpful.
You have an issue with the mentioned module MMM-GoogleMapsTraffic.
It wants to read a json input that it cannot understand.
MOst probably from the Google maps API.
SO I would assume somethings wrong with your api key for the google maps api.
But I can only guess.