I can't seem to send messages from my MKR WAN 1310 to TTN

I've been having trouble sending messages to TTN. I'm using the MKR WAN 1310 to send data to the TTN through LORA. There seems to be a connection with TTN since the live data on the TTN website receives an uplink connection, but I constantly keep getting the error message "Error sending message" within the serial monitor on the Arduino IDE. So in the end, my messages never arrive on TTN. Can someone please help since I've no idea how to fix this.

Just change line 47 and add a red wire.

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