Why will my phone not connect to my Promark P70-VR after Marshmallow update!

[Marshmallow Hater]

I got this Promark P70-VR drone for Christmas. Worked just fine connecting to wifi & app. Phone tells me update is available for Marshmallow. Figured what the hell it's gonna force it on me later anyways. Well now it (connects but says no internet). I have researched a little bit & this isn't an easy fix because I've done all of those little things to try. I just want answers on how to fix this wifi Marshmallow problem rather it's an encryption problem, app needs be updated, or Marshmallow just sucks. Thanks for your time everyone & hope someone has an legit answer for me & all the other people with this problem.