That 2014 ISO is abandonware gold. Archive it on cloud storage and another USB. One day, you’ll need to clone an old IDE drive, and nothing else will work.
Ensure the USB drive is properly formatted as FAT32 before creating the image. Conclusion acronis true image 2014 iso bootable usb
Secure Boot is blocking the legacy Linux kernel used by Acronis 2014. That 2014 ISO is abandonware gold