The error of “No Program Speed Found” will happen if no contour was actually picked. If you look at the gcode file it might show that there is actually no cutting that is being instructed. (Edit: I just looked at your gcode file and I am not seeing anything that is jumping out. I would suggest correcting the issue of the yellow outline and re-CAM and process the gcode.)
Another issue is that the post processor file could be corrupted. In that case, dump the current one and re-load from the download section of the Langmuir support page.
As far as the yellow outline in Fusion 360 Manufacturing space, it looks as if your “tool” in fusion is set with a really large kerf width. It is showing the path of the center of that tool and it is omitting lots of the detail of your object.