Hi, guys! First of all, excuse my English and thanks in advance. Believe me, writing in forums is not my forte, especially in a non-native language … I have a problem trying to configure a double jump after doing a slide on the wall, it doesn’t work, it only works well when I jump from the ground. Has anyone had this problem and knows how to fix it? Is a SideScroller template,Thank you so much!
Well, it is hard to answer this question since it really depends on your blueprint setup.
But you could just make a setup out from your jump action input with a Branch that checks is your character is falling and then another branch that checks if the character is sliding.
If these conditions are met he can jump 
Update: I resolve the problem using a “Launch Character” node instead a “Jump” node,
Update: I resolve the problem using a “Launch Character” node instead a “Jump” node, Thank you so much!
You can also use the “add impulse” node.