In T187941#4010404, @Esanders wrote:

Looks like a duplicate of T180521 from the stack trace.

Any setting there will trigger for us. Toggling text wrap, changing page justification, etc. The media gets uploaded successfully but VE hangs if you click finish after selecting anything in the advanced settings menu.

@Florian I've found a way around this for now by editing Special:UserLogin to add the appropriate links, but an automatic method of creating accounts would be greatly appreciated. Any estimate on how long this would take to effect? Thanks.

In T186831#3958941, @Tgr wrote:

# Prevent new user registrations except by sysops
#$wgGroupPermissions['*']['createaccount'] = false;

That disables registration which is why the link will also be hidden.

Cross-posted from the Discourse thread:

In T138678#3902945, @Anomie wrote:

You achieve it by setting $wgAuthManagerConfig in your LocalSettings.php. Or you could try to manipulate $wgAuthManagerAutoConfig.

More specifically, you might set

$wgAuthManagerConfig = [
    'preauth' => [ /* list your providers here */ ],
    'primaryauth' => [
        GoogleLogin\Auth\GooglePrimaryAuthenticationProvider::class => [
            'class' => GoogleLogin\Auth\GooglePrimaryAuthenticationProvider::class,
            'sort' => 101,
        ],
        MediaWiki\Auth\LocalPasswordPrimaryAuthenticationProvider::class => [
            'class' => MediaWiki\Auth\LocalPasswordPrimaryAuthenticationProvider::class,
            'args' => [ [
                'authoritative' => true,
                'localOnly' => true,
            ] ],
            'sort' => 100,
        ],
    ],
    'secondaryauth' => [ /* list your providers here */ ],
];

Or you might make sure GoogleLogin is the only extension that adds a PrimaryAuthenticationProvider, then set

$wgAuthManagerAutoConfig['primaryauth'] = [
    MediaWiki\Auth\LocalPasswordPrimaryAuthenticationProvider::class => [
        'class' => MediaWiki\Auth\LocalPasswordPrimaryAuthenticationProvider::class,
        'args' => [ [
            'authoritative' => true,
            'localOnly' => true,
        ] ],
        'sort' => 100,
    ],
];

to replace the primary providers added by MediaWiki core.

In T138678#2407361, @Anomie wrote:

I note AuthManager already supports this, and the API exposes this. It's the web UI that needs support added.

As a wiki administrator, I maybe want to disable "normal" account creations, but want to allow new account registrations with a link provider. E.g. I've a company with Google Apps for business. So my wiki should be visible (and editable) by users with a Google Mail account (with a specific domain), only. For this I want to allow user registrations with a valid Google login, but not a "manual" registration with Username/password.

This is already supported: don't include other providers (such as LocalPasswordPrimaryAuthenticationProvider or TemporaryPasswordPrimaryAuthenticationProvider) in $wgAuthManagerConfig. If you have existing local accounts that should keep working with passwords, include LocalPasswordPrimaryAuthenticationProvider but set its "localOnly" option to prevent new creations.