Upload impossible: "cannot authentificate over ajax calls"

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3

Al right: NC 13 -> 14 -> 15 -> 16 -> 17
No errors in log. The error message comes from the client (jscript).

if (!$this->userSession->isLoggedIn() && in_array('XMLHttpRequest', explode(',', $request->getHeader('X-Requested-With')))) { // do not re-authenticate over ajax, use dummy auth name to prevent browser popup $response->addHeader('WWW-Authenticate','DummyBasic realm="' . $this->realm . '"'); $response->setStatus(401); throw new \Sabre\DAV\Exception\NotAuthenticated('Cannot authenticate over ajax calls'); }

I have transfered the cloud installation to my local desktop (directory + database): In this environment the error does not occur. Therefore I cannot debug that.