Cannot read properties of null (reading 'getBoundingClientRect')
I had trouble running my Pyxel project with the Pyxel Web Launcher. Any advice? 
Here is [my repo](https://github.com/cgccld/dos)
![Screenshot 2024-07-22 131149](https://github.com/user-attachments/assets/7bbdaba6-82fa-4fb7-a655-00e67af9d8ae)
