I had to replace the Y axis belt on my Ender-3 V3 printer and when I tried to do the leveling function I got an error message along with a QR code. The message said to scan the code for the solution but scanning the code revealed an error 404, “page not found”. I printed a 10x10x5mm rectangle cuboid that seemed to print fine. I then had the brilliant idea of resetting the configuration but it stalled in the same fashion while doing there leveling. I watched it trying to do the leveling function and the extruder moves from the center to the right and left front corners a couple of times but the error message never comes up. It seems like the bed will not move all the way to the front while trying to do this.
I fixed it. Screwed up putting the bed back on the frame. Short story: I had a short spacer and hence a long spacer on the wrong side. I tried the printing the same project again and the same thing could have happened. I’m printing a box and a couple of layers after the walls start printing the filament stops sticking. I’m sure there are solutions for this in the forum.