Version 21.23 fails to install

#3
Yes, it reproduces from a saved copy of the .23 update and the same thing happens with the .24 update. I did not look at the log file for the .24 update, but I got a similar error message. One difference that I did note was that the .23 installer said that it needed 22 MB of disk space but the .24 installer (from .22) said that it needed only 11 MB of disk space.