DaEdgeMan
I watched a video where this guy downloaded a zip for his camera.
reyalp
No, the M10 is a totally different camera. There is NO CHDK for M100. To use the script, you need to follow the instructions for Canon Basic scripts, not CHDK. They are linked in the clean overlays thread https://chdk.setepontos.com/d/13489/17
The video you watched is only for installing a valid CHDK distribution zip file on a camera that supports it. As
@reyalp says, the M100 is not one of those cameras. Follow the process he outlines instead.