Yes, that can be a problem. Please use the Windows Media Creation Tool.
Video tutorial is available here: https://www.microsoft.com/en-us/windowsinsider/cleaninstall?msockid=2f024275e21f64ea3c9c52cde3346537 (This link is only available in English unfortunately, please use the browser translation if need to).
The following steps should be done on a working Windows computer:
Download the Windows Media Creation Tool from Microsoft's official website. https://www.microsoft.com/software-download/windows11 click on the "download now" button under "Create Windows 11 Installation Media"
Run the tool and select "Create installation media for another PC."
Choose "USB flash drive" as the media to use for the installation and select "Next."
Connect a USB flash drive with at least 8 GB of free space to your computer.
Select the USB flash drive you want to use, and then select "Next."
The tool will then download the required files and create the installation media.
Then put those two files in the Sources folder. It should work.