sending a page using mail icon from safari

Hi, everyone

I hope my problem is simple

While I'm using the new feature in safari ( Reader ) I clicked the mail icon
and the below massage has been shown to me every time I try It



please someone help me as soon as possible

thanks

Yes it's already installed as you see below:

THank you All guys I'll try to attach the link I need by coping it and paste
Its the only way I can use but It would be cool If I could use this feature


my best regards