CURL the challenge OK but `Invalid response` with certbot

I still keep the old challenge file in case someone need it to help me debugging

./.well-known
./.well-known/acme-challenge
./.well-known/acme-challenge/BSOuvJOhckVKlI1W7eOMHWJK9CXJ14v1ivMS1_kXg4U
./.well-known/acme-challenge/NuzvSaKKV_fUDV6jUHxcw7f1V_1qa3GYU2wm3OfuUZI
./.well-known/acme-challenge/letsdebug-test

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