This test was recently added to check if ‘grub-pc’, the boot loader for FreedomBox AMD/Intel machines, is in good installed state.
Looks like I made a mistake when modifying this patch done by @jvalleroy. We should have ignored this error on non-AMD/Intel machines. So, if you not using an AMD/Intel machine. Please ignore this issue. A fix will rollout in 2-3 weeks.