How can fix Graph API error on Facebook console - flutter

I have successfully implemented the Facebook login functionality in my Flutter App, but last some day's to getting the Graph API error on Facebook console and I have not used any Facebook functionality the related to Graph API and I'm only login with Facebook and use only email id, user name only.
So why am I getting this issue and how can I fix this?
https://prnt.sc/bFwm1SB7UQt-
And why I'm not able to submit app for review? Which to of permission need to allow for activate the submit button?
https://prnt.sc/Bm1Qzlt1siZH

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Use Facebook Graph API to disconnect a Facebook Page from a Facebook App

I have a website with a Facebook App that allows Facebook users to connect their Facebook pages to the App so that the website can use that Page in different ways.
But I cannot find a way to disconnect the Facebook Page from the App using a Facebook API (probably the Graph API?). The problem is that Facebook keeps sending webhook events as long as the Page is connected to the app.
Is there such a call?
That's done via the subscribed_apps edge on the page. Same as you can add a subscription via this, you can also remove it again.
https://developers.facebook.com/docs/graph-api/reference/page/subscribed_apps/#Deleting

Facebook user_posts permission from Messenger Platform API

I'm kinda getting lost on Facebook documentation. I'm creating a Messenger Bot. This bot is also integrated with Facebook Graph API and needs to read the users wall so he needs the user_posts permission.
My question is: how do I get this permission?
As far as I've understood, there's no real way to get it from the Messenger Platform API. So, I've started looking into the Login API. Here I found out that I can get a user access token using an embedded Javascript in a web page to show the Facebook login dialog and letting the user to access their profile.
However this sounds so cumbersome... Is there an easier way to do this?
Thank you for the help.

Sending notifications with Facebook graph API not authorized with regular users

I have created a Facebook App and published it today with Canvas Web platform.
The users can authorize the application and I can send notifications to them using the Facebook API that appear on their Facebook account on the Web.
However, it works with the developer user but not with regular users. For regular users the API call to send notifications returns this error response:
{"error":{"message":"(#200) Your app is not approved for content update notification at this time", "type":"OAuthException","code":200,"fbtrace_id":"GPVF+lOxzgp"}}
The application is published and is live. It is for publishing landing pages with videos, when when the user signs up using Facebook, he will get a notification when a new page with a video is published, so he can watch the video inside the Facebook canvas iframe.
What do I need to do to have new content notification approved? I just asked for email and profile permissions and the documentation says it does not need additional permissions to send notifications. So I have not items to submit for review.
I am using this API call described here:
https://developers.facebook.com/docs/games/services/appnotifications
It seems I was doing a mistake which as to pass a type parameter set to the content_update value. Removing that parameter solved the problem.

Facebook Issue while creating App getting message not authorized to manage apps

I want to create new Facebook User for my Facebook page. who can able to add Facebook Developer Apps to Facebook Page.
How to add Facebook developer app creation permission to Facebook User.
Currently when i have tried to add App with User getting message : -
Not Authorized To Manage Apps
Thank You

Facebook staff can't login to approve my action type...what now?

I recently submitted a request for two open graph action types to be approved after successfully testing the action type in my feed. However I am getting the following message from facebook:
Changes needed Please make the changes below and resubmit for review.
We were unable to successfully log-in to your app with the 'Login with
Facebook' button or we were unable to locate the button within your
app. Please ensure that you can successfully log-in to Facebook with
the Facebook connect button and resubmit.
https://developers.facebook.com/docs/authentication
I seem to be able to login and create a new account on my own and so can my friend, and from the submitted pictures it seems to be obvious where to click facebook connect to login...what can I do now to provide more information?
In case anybody is curious, the website is: www.bigfunny.com Thanks!