Dislocated left arm and right hand


dislocated left arm and right hand in 1-49 . I have problem like tis in ue4.14 ,In tutorial he dont fix this later, how to fix this problem from right hand and left arm dislocated?

First,make a new thirdperson project and name it ‘projectfix’ then open file explorer
and go to “documents/unreal project/projectfix/contents”
then copy the mannequin folder and go to the project folder you want to fix and delete its mannequin folder and paste the new mannequin folder