Wemos d1 mini pro keeps resetting

Hi!
I downloaded this sketch to my Wemos D1 mini pro V3.0.
It keeps freezing up about 1 second after boot up and gives me this error message in Arduino IDE 1.83:

"rst cause:2, boot mode:(3,6)"

Ive googled it but cant seem to find a way of fixing this.

I tried my wemos-board by uploading the blink example from arduino IDE and it works like a charm