Error: C9555E: Failed to check out a license.

This error message indicates that the software you are trying to use requires a license to be activated, and the license checkout process has failed.

There are several possible reasons for this error, including:

1. The license server is down or unreachable.
2. The license file is invalid or expired.
3. The license has already been checked out by another user or machine.

To resolve this issue, you can try the following steps:

1. Check if the license server is running and accessible.
2. Verify that the license file is valid and has not expired.
3. Release any unused licenses that may have been checked out by other users or machines.
4. Contact the software vendor or license administrator for further assistance.

If you are using a network license server, make sure that the license server is running and that your machine can communicate with it. If you are using a standalone license, make sure that your license file is valid, not expired, and has been installed correctly.