Could you please tell me:
Is the team owner unable to create a standard channel?
Does the Teams web client have the same problem?
Normally, team owners can create any type of channel.
According to your description, the team has reached 30 private channels. At this time, you can no longer add private channels to the team. A team can only create 30 private channels. If you want to continue to create private channels, please delete an existing private channel and recreate it after 30 days.
In addition, any combination of standard and shared channels including up to 30 private channels for a total of 1,000 channels per team.
If your team channel number does not exceed the above limit but you still cannot create a channel, please try using the Teams web client.
If this problem only occurs in the Teams desktop client, try to clear the team cache and update Teams to the latest version (New Teams).
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