That doesn't look like an error message to me, it just looks like an info readout for the audio track(s). The thing that is immediately obvious is that one track has a section for the WaveFormatExtensible header and the other doesn't (probably because one has 24-bit audio and therefore tripped the WAVE_FORMAT_EXTENSIBLE metadata and the other is 16-bit and didn't).
Does the script use
OPT_UseWaveExtensible?
With foobar2000, you are using the updated foo_input_avs.fb2k-component? And it's exhibiting the problem of working on W7 but not XP? Or it just doesn't work at all? Mainly because it seems to work fine here on Win10 with AviSynth+ 3.6.1.