Broken example files

[GitHubSwimmer]

pdflatex qr-minimal.tex
##########################################################
**! Package xkeyval Error: classic' undefined in families qr,fancyqr'.

See the xkeyval package documentation for explanation.**
Type H for immediate help.
...

l.10 \fancyqr[classic,padding]
{https://github.com/EagleoutIce/fancyqr}
........
###########################################################
pdflatex qr-example.tex
###########################################################

! Package xkeyval Error: size' undefined in families qr,fancyqr'.

See the xkeyval package documentation for explanation.
Type H for immediate help.
...

l.23 \fancyqrset{size=3.25cm, level=H, padding}
......

[GitHubSwimmer]

.....
! Package xkeyval Error: random color' undefined in families qr,fancyqr'.

See the xkeyval package documentation for explanation.
Type H for immediate help.
.....

[EagleoutIce]

So the problem may be that you have an older installation from texlive which interferes with this repository. Could you please add the logfile lines related to the loading of fancyqr?

[GitHubSwimmer]

Dear Florian, this bug can be closed, it was a problem of usage the wrong fancyqr library