It sounds like you are experiencing an issue with the GitHub Education application form not allowing you to upload documents or using the camera. This could be due to a variety of reasons, such as incorrect permissions, outdated software, or issues with your internet connection.

Here are some troubleshooting steps you can try:

Check your browser and device settings: Make sure that your webcam is enabled and working properly on your device. Also, check your browser's privacy settings to ensure that you have granted the necessary permissions for the camera feature.
Try a different browser or device: If you have tried multiple devices and browsers with the same issue, it may be worth trying a different one to see if the problem persists.
Reset your GitHub Education application: You can try resetting your GitHub Education application by clicking on the "Reset" button at the top of the form. This will remove any existing information you have entered and allow you to start fresh.
Contact GitHub Support: If none of the above steps work, you may want to reach out to GitHub Support for further assistance. They may be able to provide more specific guidance or offer additional troubleshooting steps. You can find their contact information on the GitHub Help Center page.