As

@Meta4 said, it clearly went into ATTI mode due to serious compass errors, possibly due to the takeoff location have magnetic interference. The good news is that the resulting drift was very consistent in speed and direction, and so it should have kept going until critical battery level initiated autolanding. Estimating by linear regression and extrapolation we get:

View attachment 92344
That suggests it would have drifted out to around 2160 m from the home point. Plotting on GE:

View attachment 92345
I'd start looking around there. For what it's worth, error analysis at the 99% confidence level suggests a circle of radius 150 m, but that includes extrapolation assumptions regarding wind speed, direction, power use and autolanding battery level, so not to be taken as definitive. And if it autolanded at 10% instead of 15%, then that would put it around 2600 m and in the field the other side of the railway line.