Disappeared Atou Nave

hi ,
I have a client who wants a website in English,Arabic After I've done the steps for that then Disappeared Atou Nave .
when Add Auto- Nave gave me massage " call_user_func_array() expects parameter 1 to be a valid callback, class 'Concrete\Core\Permission\Key\AddBlockBlockTypeKey' does not have a method 'canAddBlock' ".

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shotrox replied on at Permalink Reply
I may be able to help. Please get in touch via private message.
Thank you