I got this error using "drupal-check" command.
$ drupal-check /c/Bitnami/drupal-8.7.10-0/apps/drupal/htdocs/modules/contrib/social_auth_mailru
2/7 [========>-------------------] 28%PHP Fatal error: Declaration of Drupal\social_auth_mailru\MailruAuthManager::getExtraDetails($url) must be compatible with Drupal\social_auth\AuthManager\OAuth2Manager::getExtraDetails($method = 'GET', $domain = NULL) in C:\Bitnami\drupal-8.7.10-0\apps\drupal\htdocs\modules\contrib\social_auth_mailru\src\MailruAuthManager.php on line 15
In MailruAuthManager.php there is passed "$url" argument to getExtraDetails function, but in OAuth2Manager.php in social_auth module, function is built like this getExtraDetails($method = 'GET', $domain = NULL), so arguments are not matching.
When I've commented these lines, I got another error:
$ drupal-check /c/Bitnami/drupal-8.7.10-0/apps/drupal/htdocs/modules/contrib/social_auth_mailru
2/7 [========>-------------------] 28%PHP Fatal error: Class Drupal\social_auth_mailru\MailruAuthManager contains 2 abstract methods and must therefore be declared abstract or implement the remaining methods (Drupal\social_api\AuthManager\OAuth2ManagerInterface::getAuthorizationUrl, Drupal\social_auth\AuthManager\OAuth2ManagerInterface::requestEndPoint) in C:\Bitnami\drupal-8.7.10-0\apps\drupal\htdocs\modules\contrib\social_auth_mailru\src\MailruAuthManager.php on line 15
I think that social_auth_mailru is wrong implemented with social_auth module.
Fixed
3.0
Code
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It's likely this issue predates Contrib.social: some issue and comment data are missing.
Social Auth 2.x is not supported already. We need to update this module for compatibility with Social Auth 3.x and for 4.x after that.
Automatically closed - issue fixed for 2 weeks with no activity.