After update to 3.1.,1 exception: cannot declare class..." on activating other extension in backend
I update sg_cookie_optin to v3.1.1 yesterday with composer update.
Today I want to activate another extension in extensions manager. On activating this extension the backend is broken with following exception:
Cannot declare class SgCookieAbstractViewHelper, because the name is already in use
If I downgrade sg_cookie_optin to 3.0.0 everything is fine. I can activate and deactivate those extension.