token header part can't transform to utf8

[Y0QIN]

there occured a error while I try to transform base64 to utf8 with:
Buffer.from(tokenSections[0], 'base64').toString('utf8');

窫늷똦䊖ꈣ蘦垗撦鍔ٕꏇ獇숵ᛶ猓䝳著뒖꒔랦蔅읆卦ጵ⋒⛂옖⍲▢㌥匣❢	2020-12-24T10:00:30.458Z bf03fc05-77d2-4d46-ac96-7a5017e07f12 INFO 窫늷똦䊖ꈣ蘦垗撦鍔ٕꏇ獇숵ᛶ猓䝳著뒖꒔랦蔅읆卦ጵ⋒⛂옖⍲▢㌥匣❢