two IMAP servers

[ziblis]

How do I connect a second IMAP server for authentication?
Nextcloud Hub 25 Autumn (32.0.2)
Here's the config:

 'user_backends' =>
  array (
    0 =>
    array (
     'class' => '\\OCA\\UserExternal\\IMAP',
     'arguments' =>
      array (
        0 => 'mail.domain1.com',
        1 => 993,
        2 => 'ssl',
        3 => 'domain1.com',
        4 => false,
        5 => false,
        ),.
    ),
    1 =>
    array (
     'class' => '\\OCA\\UserExternal\\IMAP',
     'arguments' =>
     array (
       0 => 'mail.domain2.com',
       1 => 993,
       2 => 'ssl',
       3 => 'domain2.com',
       4 => false,
       5 => false,
       ),
     ),
   ),

User userx@domain1.com logs in normally.
User usery@domain2.com have error Internal Server Error
in nextcloud.log:
{"reqId":"16288Eia1QgwTtaMlrY0","level":3,"time":"2025-12-01T11:13:54+00:00","remoteAddr":"195.96.64.194","user":"--","app":"index","method":"POST","url":"/login","message":"Call to undefined method OC\\Server::getLogger() in file '/var/www/nextcloud/apps/user_external/lib/IMAP.php' line 74","userAgent":"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/142.0.0.0 Safari/537.36","version":"32.0.2.2","exception":{"Exception":"Exception","Message":"Call to undefined method OC\\Server::getLogger() in file '/var/www/nextcloud/apps/user_external/lib/IMAP.php' line 74","Code":0,"Trace":[{"file":"/var/www/nextcloud/lib/private/AppFramework/App.php","line":153,"function":"dispatch","class":"OC\\AppFramework\\Http\\Dispatcher","type":"->"},{"file":"/var/www/nextcloud/lib/private/Route/Router.php","line":321,"function":"main","class":"OC\\AppFramework\\App","type":"::"},{"file":"/var/www/nextcloud/lib/base.php","line":1061,"function":"match","class":"OC\\Route\\Router","type":"->"},{"file":"/var/www/nextcloud/index.php","line":25,"function":"handleRequest","class":"OC","type":"::"}],"File":"/var/www/nextcloud/lib/private/AppFramework/Http/Dispatcher.php","Line":150,"Previous":{"Exception":"Error","Message":"Call to undefined method OC\\Server::getLogger()","Code":0,"Trace":[{"file":"/var/www/nextcloud/lib/private/User/Manager.php","line":230,"function":"checkPassword","class":"OCA\\UserExternal\\IMAP","type":"->","args":["*** sensitive parameters replaced ***"]},{"file":"/var/www/nextcloud/lib/private/Authentication/Login/UidLoginCommand.php","line":29,"function":"checkPasswordNoLogging","class":"OC\\User\\Manager","type":"->","args":["*** sensitive parameters replaced ***"]},{"file":"/var/www/nextcloud/lib/private/Authentication/Login/ALoginCommand.php","line":22,"function":"process","class":"OC\\Authentication\\Login\\UidLoginCommand","type":"->"},{"file":"/var/www/nextcloud/lib/private/Authentication/Login/UserDisabledCheckCommand.php","line":39,"function":"processNextOrFinishSuccessfully","class":"OC\\Authentication\\Login\\ALoginCommand","type":"->"},{"file":"/var/www/nextcloud/lib/private/Authentication/Login/ALoginCommand.php","line":22,"function":"process","class":"OC\\Authentication\\Login\\UserDisabledCheckCommand","type":"->"},{"file":"/var/www/nextcloud/lib/private/Authentication/Login/PreLoginHookCommand.php","line":34,"function":"processNextOrFinishSuccessfully","class":"OC\\Authentication\\Login\\ALoginCommand","type":"->"},{"file":"/var/www/nextcloud/lib/private/Authentication/Login/Chain.php","line":43,"function":"process","class":"OC\\Authentication\\Login\\PreLoginHookCommand","type":"->"},{"file":"/var/www/nextcloud/core/Controller/LoginController.php","line":353,"function":"process","class":"OC\\Authentication\\Login\\Chain","type":"->"},{"file":"/var/www/nextcloud/lib/private/AppFramework/Http/Dispatcher.php","line":204,"function":"tryLogin","class":"OC\\Core\\Controller\\LoginController","type":"->","args":["*** sensitive parameters replaced ***"]},{"file":"/var/www/nextcloud/lib/private/AppFramework/Http/Dispatcher.php","line":118,"function":"executeController","class":"OC\\AppFramework\\Http\\Dispatcher","type":"->"},{"file":"/var/www/nextcloud/lib/private/AppFramework/App.php","line":153,"function":"dispatch","class":"OC\\AppFramework\\Http\\Dispatcher","type":"->"},{"file":"/var/www/nextcloud/lib/private/Route/Router.php","line":321,"function":"main","class":"OC\\AppFramework\\App","type":"::"},{"file":"/var/www/nextcloud/lib/base.php","line":1061,"function":"match","class":"OC\\Route\\Router","type":"->"},{"file":"/var/www/nextcloud/index.php","line":25,"function":"handleRequest","class":"OC","type":"::"}],"File":"/var/www/nextcloud/apps/user_external/lib/IMAP.php","Line":74},"message":"Call to undefined method OC\\Server::getLogger() in file '/var/www/nextcloud/apps/user_external/lib/IMAP.php' line 74","exception":{},"CustomMessage":"Call to undefined method OC\\Server::getLogger() in file '/var/www/nextcloud/apps/user_external/lib/IMAP.php' line 74"}}