# Troubleshoot LMS connections

> What each message means when opening CuraCourse from an LMS, and how to fix it.

Source: https://www.curacourse.com/help/lms-troubleshooting

## Messages you may see
| Message | What to do |
| --- | --- |
| Waiting for approval | Your LMS isn't connected to your organization yet. Open CuraCourse once with an activation code; see [Connect CuraCourse to your LMS](https://www.curacourse.com/help/connect-your-lms). |
| This activation code does not work | The code was used, replaced, or expired. Create a new one under **Organization → LMS** and update it in your LMS. |
| Launch as an instructor or administrator | The first time, CuraCourse must be opened by a teacher or administrator in the LMS. |
| Organization not verified yet | [Contact support](https://www.curacourse.com/contact?topic=support) to verify your organization. |
| Connected to another organization | Your LMS already belongs to another CuraCourse organization. Contact support. |
| CuraCourse is turned off here | Your LMS was disconnected. Contact support to turn it back on. |
| Not connected yet | An instructor needs to open the LMS course and pick its CuraCourse course. |
| This launch expired | Close the page and open CuraCourse from your LMS again. |

## The LMS can't add CuraCourse
If the LMS reports an unknown platform, an invalid client, or a signature error, check that the client ID and URLs match in both your LMS and CuraCourse. For Canvas, switch the key **On** before adding it to CuraCourse. Keep test and live setups separate.

## A grade is missing
Open the LMS link once as the instructor. Then, in CuraCourse, go to **Course settings → LMS**. It shows each link's assignment, its grade column, and the last error. Fix the problem and choose **Resend grades**.

## CuraCourse asks you to open it in a new tab
Some LMS pages show CuraCourse inside the page, where browsers block sign-in. CuraCourse then shows **Open CuraCourse**, which opens it in a new tab. To skip this step, set the tool in your LMS to open in a new window.