git-http-backend/nginx - error 22 on push

Question

I have an online server (Ubuntu 17.04) that host my bare repos. I tried to set up HTTPS on this server, and I can pull but I can't push, it fails with the following error:

error: Cannot access URL https://user:[email protected]/REPO/, return code 22 fatal: git-http-push failed error: failed to push some refs to 'https://user:passwd@myserver/REPO/'

The nginx config relevant part looks like that:

# static repo files for cloning over https
location ~ ^.*\.git/objects/([0-9a-f]+/[0-9a-f]+|pack/pack-[0-9a-f]+.(pack|idx))$ {
    client_max_body_size 0;
    auth_basic  "Restricted Area";
    auth_basic_user_file /etc/apache2/.htpasswd;
    fastcgi_param REMOTE_USER $remote_user;
    root /home/git/;
}

# requests that need to go to git-http-backend
location ~ ^.*\.git/(HEAD|info/refs|objects/info/.*|git-(upload|receive)-pack)$ {
    client_max_body_size 0;
    auth_basic  "Restricted Area";
    auth_basic_user_file /etc/apache2/.htpasswd;
    root /home/git/;

    #fastcgi_pass unix:/var/run/fcgiwrap.socket;
    fastcgi_param SCRIPT_FILENAME   /usr/lib/git-core/git-http-backend;
    fastcgi_param PATH_INFO         $uri;
    fastcgi_param GIT_PROJECT_ROOT  /home/git/;
    fastcgi_param GIT_HTTP_EXPORT_ALL "";
    fastcgi_param REQUEST_METHOD $request_method;
    fastcgi_param REMOTE_USER $remote_user;
    include fastcgi_params;
}

In all the thread I read the problem came from the REMOTE_USER fastcgi param or the local git config that lacked user/passwd in the remote URL, but I set up that so I am clueless. Does anyone have an idea or see a problem?

EDIT: Here is my .git/config:

[core]
    repositoryformatversion = 0
    filemode = false
    bare = false
    logallrefupdates = true
    symlinks = false
    ignorecase = true
[remote "origin"]
    url = https://user:[email protected]/REPO/
    fetch = +refs/heads/*:refs/remotes/origin/*
[branch "master"]
    remote = origin
    merge = refs/heads/master
[user]
    name = git

Answer 1

Without reproducing your setup, are you sure that receivepack is correctly enabled, according to the documentation?

And what if you try to update your local .git/config URL like in this post (look at the comment)