If you upgrade the Group module to the version 2 when you access /admin/group/sso there is an error and the page cannot be loaded.
The Group SSO version is prepared to work with the version 1 of the module Group. In the migration to the version 2 of the module Group a method has been removed getMemberRoleid ( https://www.drupal.org/docs/extending-drupal/contributed-modules/contrib... → )
Probably it is necessary to create a new version of the Group SSO module to support the version 2 of the Group module and mantain the version 1 to support the version 1 of the Group module
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Hi @diegocg, given the urgency we have to make the GSSO compatible with Group 2 API I propose the following patch that replace the usage of some deprecated methods from GroupType entity - please consider the patch to publish a new release of GSSO compatible with Group 2 API.