Your contact can't open up your presentation?! 😨
Don’t panic, this is solved very easily.
If you happen to share a presentation while having it set to be Private, the other person will end up opening a page like this:
In order to correct this, make sure your presentation is not Private.
If you wish to keep your presentation Private, make sure you granted permissions to the specific individuals you wish to share it with.
Keep in mind: when sharing a presentation in Private, all people accessing it must be registered to Slidebean.