As a temporary workaround you can try to launch the game directly (bypass the launcher). There is an ESO.EXE file in the same folder as where the launcher is (if you don't know where it is, just right click the launcher shortcut and look at the properties for the file path).

When you scroll down on the details of the crash what does it say there?

If you can't get the launcher to behave, be sure to open a ticket with customer support.