The nodes locales are the same. After going back to an older version of nuget the Illegal Characters bug went away. However, I then got a different bug when running msbuild at the node about Tasks being repeated or a similar message. The new bug turned out that I was missing the Nugget Targetting Pack. Once that was installed everything went back to normal. Now that the Targets are installed, I may try going back to the newer version of Nuget and see f they now work. Will keep everyone posted.