M5Stack2 EduKit - partition 2 invalid / Failed to verify partition table

[torntrousers]

Hi, I'm trying this with a M5Stack Core2 AWS EduKit module but after flashing the firmware it goes into a reboot loop:

[0;31mE (12) flash_parts: partition 2 invalid - offset 0x10000 size 0x400000 exceeds flash chip size 0x400000�[0m
�[0;31mE (12) boot: Failed to verify partition table�[0m
�[0;31mE (16) boot: load partition table error!�[0m
�[0;31mE (12) flash_parts: partition 2 invalid - offset 0x10000 size 0x400000 exceeds flash chip size 0x400000�[0m
�[0;31mE (12) boot: Failed to verify partition table�[0m
...

Any ideas on whats wrong and how to fix it?