I am getting this error which setting up WhatsApp Business Platform API.

I am really struggling and unable to get any form of support from Facebook. We are being asked to connect our developer page to a verified business.
I have verified my business eventually, as for some reason my usual FB account was restricted (no idea why, no right of appeal, no way to log into that account on the developer page now and no way of asking for help).
I set up another FB user and have eventually managed to verify the business but when I try to connect my developer page to the business the next button is greyed out. I believe I have the correct permissions.
Image attached of where I am stuck.
Any ideas would be greatly appreciated.

When I am creating new store manually through Facebook business manager, After filling all the information, it is showing this error - (#371) Your location Page wasn't saved.
Looking for the help, how to get it resolved this, No answer got from Facebook chat support after multiple emails.

Hi guys, I'm trying to do an app that needs to use group API. However, I do not have "group_access_member_info" and other group permission in Graph API to test. What do I have to do to have those? (My business is verified and the app type is Business) Thanks in advance.

I am using this script based on the documentation: https://developers.google.com/google-ads/api/samples/add-image-extension

def create_image_extensions(df):     for index,row in df.iterrows():         extension_feed_item_service =              client.get_service("ExtensionFeedItemService")         extension_feed_item_operation =              client.get_type("ExtensionFeedItemOperation")         extension_feed_item = extension_feed_item_operation.create         extension_feed_item.image_feed_item.image_asset =               client.get_service("AssetService").asset_path(account_id,                  row.asset_id)         response = extension_feed_item_service.mutate_extension_feed_items(customer_id=account_id, operations=\[extension_feed_item_operation\])         image_resource_name = response.results\[0\].resource_name         print("Created an image extension with resource name: "f"'{image_resource_name}'")             campaign_extension_setting_service = client.get_service("CampaignExtensionSettingService")         campaign_extension_setting_operation = client.get_type("CampaignExtensionSettingOperation")         ces = campaign_extension_setting_operation.create         ces.campaign = client.get_service("CampaignService").campaign_path(account_id, row.campaign_id)         ces.extension_type = client.enums.ExtensionTypeEnum.IMAGE         ces.extension_feed_items.append(image_resource_name)              response = (             campaign_extension_setting_service.mutate_campaign_extension_settings(                 customer_id=account_id,                 operations=[campaign_extension_setting_operation],             )         )         print("Created a campaign extension setting with resource name: "f"'{response.results[0].resource_name}'")` 

But running into an error now:

Method: /google.ads.googleads.v15.services.ExtensionFeedItemService/MutateExtensionFeedItems, RequestId: B5OFT8TdalKrrmx0lEdMkA, IsFault: True, FaultMessage: Feed-based extension is read-only for this extension type. error_code {     feed_error: LEGACY_EXTENSION_TYPE_READ_ONLY   }   message: "Feed-based extension is read-only for this extension type."