If you cannot find a working link, or the image keeps failing:
Before booting, you must configure your PC's BIOS to play nice with macOS. Common settings include: olarila catalina 10.15.7 download
Delete /EFI/OC/Kexts/ or /EFI/CLOVER/kexts/Other/ files you don’t need (e.g., remove IntelMausi if you have Realtek Ethernet). If you cannot find a working link, or
Plug the USB into your PC and boot from it (usually by pressing F12, F8, or Del during startup). olarila catalina 10.15.7 download
You can find the specific image files on the Olarila official forum. "Olarila macOS Catalina 10.15.7".