Re: Launcher won't log in. Invalid email/password

@ACMParks  I believe the launcher uses either Safari or whatever the default browser is on your computer.  Do you use any software that purports to clean temp files?  Have you set your browser(s) to block cookies or certain kinds of trackers?  In either case, the launcher might not be able to write to the location where it stores its data, or perhaps it can't even use the browser to validate your email address.

A (sort of) simple test would be to create a new admin account on your Mac and try signing into the launcher there.  The new account should come with default user settings, although you might still need to temporarily disable any cleaner apps you normally run.

I'm having the same issue. Were you able to find a solution? Thanks. 

@willvandy21  Have you tried changing your password to something with only letters and numbers, and clearing the cache for Internet Explorer?  Even if you don't use it, the launcher does for some purposes.  Be sure to uncheck the box to preserve data for favorite sites.

https://kb.wisc.edu/page.php?id=15141

@AdmeteSim  Did you try the suggestions earlier in this thread?