I was having the same issue but making sure every box had an entry let it save, so just make sure none of them are blank. Manually typing in 0 (which I assume means "auto"?) worked for me for the options I didn't want to change.
Log file isn't uploading but this is the important bit:
2022-11-03 5:45:09 PM: Quest Link option set: DistortionCurve = Default
2022-11-03 5:45:09 PM: Could not set registry values for Quest Link: The type of the value object did not match the specified RegistryValueKind or the object could not be properly converted.
2022-11-03 5:45:47 PM: Quest Link option set: DistortionCurve = Default
2022-11-03 5:45:47 PM: Could not set registry values for Quest Link: The type of the value object did not match the specified RegistryValueKind or the object could not be properly converted.
2022-11-03 7:13:04 PM: Quest Link option set: DistortionCurve = Default
2022-11-03 7:13:04 PM: Quest Link option set: EncodeWidth = 4040
2022-11-03 7:13:04 PM: Quest Link option set: BitrateMbps = 850
2022-11-03 7:13:04 PM: Quest Link option set: Dynamic Bitrate Max = 500
2022-11-03 7:14:09 PM: Quest Link option set: DistortionCurve = Default
2022-11-03 7:14:09 PM: Could not set registry values for Quest Link: The type of the value object did not match the specified RegistryValueKind or the object could not be properly converted.
2022-11-03 7:14:13 PM: Quest Link option set: DistortionCurve = Default
2022-11-03 7:14:13 PM: Quest Link option set: EncodeWidth = 0
2022-11-03 7:14:13 PM: Quest Link option set: BitrateMbps = 0
I was having the same issue but making sure every box had an entry let it save, so just make sure none of them are blank. Manually typing in 0 (which I assume means "auto"?) worked for me for the options I didn't want to change.