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I FOUND LIFETIME SOLUTION FOR FACEBOOK GROUP SHARE : TRY THIS

This facebook multi post share tool help you to share your link to facebook groups & friends.You can share here your website page, blog post,affliate link etc.. for increase your earning from internet .This tools also help you to increase your website traffic.Get More Traffic on your site by SEO

Facebook multi post share tool : Bug Report

Most of the time you get this kind of error in this tool
-" API error code:1"
-"API Error descripition : An unknown error occurred"
-"Errro Message : No permission to post : You do not have permission to post"

Facebook multipost share tool

This error is due to group admin do not give you permission to share your post directly in the group.
Note:Your post will not share to all groups after that group ( Which not give you permission to share).So try to add such type of group in the end of all group.