@MrT10001 "relock a bootloader on a device running Ubuntu Touch"

I haven't see that option after rebooting, its just plain and simple stuff using the GUI, I'm so confused

@luemn_a No, I don't recall that. Cheers

said in Not able to install any other OS on FP4:

fastboot flashing unlock_critical

Thanks @TheVancedGamer

FAILED (remote: 'Flashing Unlock is not allowed')
fastboot: error: Command failed

I've installed UT on my wife's FP4, she doesn't like it, arghh
I've tried to install FP factory OS but no luck. Device is unlocked

The following is the error given:

ERROR: The critical partitions are not unlocked.
Please refer to our support articles for help.
ERROR: Aborting now (press Enter to terminate).

So I though that I could try something else and this time I've tried CalyxOS and come up with another error:

5.1. Please use the volume and power keys on the device to unlock the bootloader (critical) -

Failed to unlock (critical) FP4 ed42d694 bootloader