MIT App Inventor BLE crash

I’m working on an app to control my RC car with an HM-10 BLE module, but every time I try to send any data from my phone to the HM-10 the app just crashes. No error message is shown or anything.

I tried an LED control app (LED Control with BLE Module HM10 - MIT App Inventor - Robo India || Tutorials || Learn Arduino || Robotics) and it doesn’t crash and it works just fine.