No permission error when backupping Teams only

[OrhanTozan]

I am only getting this error when creating a backup for groups. When creating a backup for onedrive, sharepoint and exchange, it goes OK

∙ 548d73a6-f977-4cf1-ab13-43f09757f200: getting conversations: Access is denied. Check credentials and try again.: Access is denied. Check credentials and try again.: Access is denied. Check credentials and try again.: Access is denied. Check credentials and try again.

I guess this is relevant. It came before:

Error: Unable to complete backup
Message: <nil>
Metadata:{"assist_bases":"1","backup_id":"e97f6f86-eeac-462b-b069-14ee78a3cf2f","can_use_metadata":"true","can_use_previous_backup":"true","categories":"[Libraries Messages Posts]","category":"conversationPosts","clues_trace":"c3e7fbf1,5f299116","disable_assist_backup":"false","graph_api_err":"{isODataErr:true Details:[] Inner:{ClientRequestID: Code: Date:0001-01-01 00:00:00 +0000 UTC OdataType: RequestID:} Main:{Code:ErrorAccessDenied Message:Access is denied. Check credentials and try again. Target:} Resp:{Message: StatusCode:403}}","group_id":"5ef466e2-25d8-4790-8161-302627b2335a","group_name":"Training Office 365 - dag 1","incremental":"true","merge_bases":"0","request_retry_iter":"0","resource_owner_id":"5ef466e2-25d8-4790-8161-302627b2335a","resource_owner_name":"Training Office 365 - dag 1","service":"Groups","tenant_id":"f982e35b-9fba-46e4-a2b5-1d63e92f0fe1"}

[OrhanTozan]

Issue was missing permission. I think doc needs to be updated.

PS: for the support of restoration, it would need to be a group.readwrite instead of group.read, wouldn't it?