[Bug 39837] Tried to install MS .NET 4.5 in Winetricks. This came out as the error.

https://bugs.winehq.org/show_bug.cgi?id=39837

--- Comment #3 from Rosanne DiMesio  ---
Winebottler is a third party app, and not supported here.

You need to retest in a clean wineprefix using plain Wine 1.8, and make sure
you have the latest version of winetricks from
https://raw.githubusercontent.com/Winetricks/winetricks/master/src/winetrick....

Winetricks dotne45 installs without any problem for me in 1.8. This bug is most
likely invalid (hacked/old Wine version, unclean wineprefix, probably outdated
winetricks).