There seems to be an incompatibility between the motherboard's BIOS/UEFI ACPI implementation and ACPI code embedded in newer GNU/Linux kernels. Redhat's online help center did in fact suggest to update the system's BIOS in case of ACPI error messages appearing at boot, but honestly I haven't found any info on whether Gigabyte was able to fix the problem. Anyway, the latest bios version from the vendor dates back to 2018, and it's v.1.05.03RGI5.
On bugzilla, a user recently reported he found a fix for his error "ACPI BIOS Error (bug): Failure creating named object [\_SB.PCI0.XHC.RHUB.HS07._UPC], AE_ALREADY_EXISTS (20210730/dswload2-326) [...]": supposedly, just disabling the sleep states in the BIOS did the trick (procedure changes depending on your bios layout, however generally under "power management" check ACPI_standby_state or suspend type is on S5/OFF)
Also, booting with uefi ENABLED and secure boot DISABLED was thought to be a possible solution.
Hope this helps, if any of these solutions worked for you please share it, your feedback will be useful for others with the same problem