Sharing app content to stage, Insufficient RSC permission

Hello,

sharing the content of our app hasn't worked for a week.

Using the Teams WebApp we are getting the following errors in the developer console:

CID[main] ShareExtensibleAppButtonContainer: Installed app is undefined or doesn't have authorization
Insufficient RSC permission for appId:'' with isChannelMeeting: false

it worked last month, and nothing was changed from our side.

I tried to set the following permissions, but it has had no effect.

"authorization": {
    "permissions": {
      "orgWide": [],
      "resourceSpecific": [
        {
          "name": "MeetingStage.Write.Chat",
          "type": "Delegated"
        },
        {
          "name": "ChannelMeetingStage.Write.Group",
          "type": "Delegated"
        }
      ]
    }
  }

could anyone help me to get it working?

Thank you