Hi,
i have my vf page & Controller with custom buttons and my controller will do DML on child object.
this VF is on my customobject detail page as a inline VF.
which is working perctly when i am in classic view, now the problem is in lightning view.
In Lightning view, when i click on button, it is changing url of the brower and url is like my vf page. finally, it is gving me "Invalid Page." Error.

Need help on this.

Thanks in Advance.

-Suma.