FYI - I briefly looked at the file - while it appears to be ok from a DRC check standpoint, it has problems from a design standpoint. Especially for an Audio amp. Always recommend Horizontal, Vertical and 45Deg angle traces for reduced EMI/Noise and better CNC machining.
Below is a quick (partially) tweaked photo of your board… Compare some of the traces to original… Several more traces should be tweaked…
