Copilot Studio Agent in Teams shows usage limit error

I have developed an AI Agent using Copilot Studio, which works as expected within the Copilot Studio environment. The agent can:

• Provide step-by-step guidance from SOP documents
• Create tickets using Power Automate
• Handle user queries effectively

All functionalities work correctly when tested directly in Copilot Studio. However, after publishing the agent and adding it to a Microsoft Teams channel, I encounter this issue:

• The agent was successfully added to the Teams channel
• End users receive the error: “This agent is currently unavailable. It has reached its usage limit. Please try again later.”
• The issue does not occur for the Copilot Studio admin/owner — only for standard users

Has anyone faced this issue, and what steps can resolve it?