Obviously, compiling this just yields
A sample citation: [1, p. 1]arg two?no arg three.
\autocite itself definitely isn't using the argument.
Why is this so, and how can it be fixed?
Note the red
\ when only one argument is given:
Apparently the extra opening brace was the culprit. Which can be easily fixed by changing
So replace the following in line 306
and line 307