I believe changing PLATFORM FRICTION in character settings to like 500 will allow for wall jumping. Also change WORLD UI Friction setting to 500. I THINK....don't quote me...lol.
I searched the forum [again and again, cause i too found this tutorial and it was already answered in 2016]. but here it is it uses Platform Friction and Advance move. ~ if anyone else knows a different way this can be done that also would be helpful