You found a solution! 😊 All my attempts 6 or 7 were made with flash drives from the same manufacturer. At the end I tried to change to different and... success! Thank you for your help.
I have similiar problem on the older HP Desktop. When this message is displayed, when I click OK or close the window - installation is stopped.
1. I am installing Windows 11 23H2 version from Download Windows 11
2. I am using Rufus 4.5 version
3. Media created using Rufus - just ticked no TPM...