A customer's 'internet service company blah blah blah' did 'something' we do not know on a previously working 1.9.2.1 installation.
Fontend works.
But when accessing /admin
we got no error but a redirect to
/index.php/admin/index/index/key/<some_random__key>/
And, so, we cannot access no more to admin panel.
Also, I tried to navigate to
http://www.customerdomain.ext/downloader
It works, and, here, the login works.
I tried to select one of the lib and choose 'reinstall', but I got an iframe with the downloader login form....
I've no previous experience with Magento.
Please note: Our customer is on a shared host. We can read apache error logs but there are NO error logged. And I cannot login with bash and upgrade it.
I'm asking some idea of possible source of this error.
Yes, we know, this MUST BE UPDATED. But, first, we must make it works again.