Unexpected end of json input

[mikolajfrohmberg]

Hello,
I'm creating a LED music visualiser using STM32 microcontroller with configured virtual COM port.
My output is a LED Matrix. The input data is send by p5 app, which uses p5-serialport library and works as a music player.
As a server i use the 0.0.5v of p5.serialcontrol for Windows.
Unfortunately, after between 10 or 50 seconds (randomly) i get an error, which makes everything stop until i close the error and refresh my application... And it repeats...
Any ideas? :/ It's very important for me to find out where is the problem...