Why if you are not signed in to Facebook trying to share via message causes an error on the login form?

All the good time. Please tell me what I missed in the application settings in Facebook Developers?
If the user has not previously logged in, when trying to share via message causes an error on the login form in FB.

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Subsequent input directed to the usual form share to share the link on the wall.

If the user previously logged in to FB, it opens form balls links via sending personal messages.

How to get rid of errors to form, given that the link to the website and App's Domain is full?

p.s. balls used to link species
https://www.facebook.com/dialog/send?app_id=``***...
July 9th 19 at 12:52

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