cant get firefox 64 to work

Every time I try to run Firefox 64 (minefield) it has an error that says, "C:\Program Files (x86)\Minefield\firefox.exe
The application has failed to start because its side-by-side configuration is incorrect. Please see the application even log for more detail."

Any suggestions on how to fix this?

I had a similar issue

Try this version x64 that adds spell checking

64bit - x64 - Firefox x64, version requiring no installation

jan 2nd build works very well!! noticeably faster page loading than 32 bit

thanks