How can I disable the registration button in groupjove events? I would like insert events just as information, and optionally link the official registration form, but not use the embedded one.
You can't. It's designed for scheduling and attending of events. There's no way to disable the attendance features without editing its core code and removing the usages.
Other thing: you know a possible reason because the addresses that I set in my events aren't linkable and is not possible to show the maps? (see attachment).
Location (required) is only linked if you provide a valid Address (not required). You also need to have plotting enabled within GJ > Config > Integrations > Events > General (should be enabled by default).