Bone heat weighting

i have problem with automatic weight it said Bone Heat Weighting: failed to find solution for one or more bones so i put here the file maybe someone wanna help me solve this…i put the file in we transfer https://we.tl/t-y5iKQCIma4 maybe someone can help

Hi, i was checking your files… its fixable …but you have to do it step by step. Seperate all mesh and check which mesh causing the problem. Check my video…