EFI partition not defined

[fergrorke]

I'm trying to install Elementary OS 8 on my Windows 11 laptop. It was configured to dual boot with another Ubuntu-based distro which I want to overwrite. During the install process I can select the Linux (to be formatted), swap and boot/efi partitions but I get the following fail message:

ERROR: libdistinst: pointer to EFI is null
ERROR: libdistinst: pointer to EFI is null
ERROR: libdistinst: pointer to EFI is null
ERROR: errored while installing system: partition validation: EFI partition was not defined
INFO: Install error: partition validation: EFI partition was not defined

Any idea what going on here and how to overcome it?