Hello, happy to hear your commitment!
Override codes works on specific strongholds, If you have issues I am glad to help!
Click to accept the report on command post, before choosing an option, open the override panel and write in/copy in the override code. If it still does not work, go to Settings, General, and there is a setting "Show Override Choices: OFF", if you click it, the override choice will appear when you go to the command post, IF you have unlocked the override code in the tech tree.
Do post screenshot if you still having issues!