Yeah those browserinfo lines seem to be out of place but strangely enough, i have the same in my log files.
In any case, i have figured out the problem. I was able to download the episodes he couldn't and then i tried to get it to fail and was also successful at that ;)
@Chrswbr1: The problem stems from the fact that, for some reason or other, those episodes do not have an H264 High Profile. Your settings are set to download H264 High and since you scanned an episode that did have an H264 High profile, it set the whole queue to be downloaded with that profile. Once it gets to those episodes, it just fails. Maybe StreamFab can add some error handling for that scenario.
It worked for me right away because i have my settings set to download in H265 HDR10 and StreamFab does have extensive error handling for that scenario. It tries all profiles lower than the one selected until it finds one that works. I suspect that every Netflix video always had both H264 High and Main profiles so error handling wasn't needed when you have the settings on H264.
Your workaround would be to change your settings to download with the H264 Main profile.
Interestingly enough, i saw that episodes 13 and 15 are available in H265 SDR. That is the first non-Netflix show i have seen to have H265. I don't know if it is because there was a bug in previous StreamFab versions where it didn't accurately check for H265 SDR if there was no HDR10 version or if this is a change implemented by Netflix. Either way, i guess i have some poking around to do and i can report back.