OK I think both commands are wrong. (I’ve added that to my list of things to edit.) However most of the time, you can ignore that command anyway. I have never done it (because I have assumed that I have everything that is needed already installed, which admittedly may not pan out as an assumption).
On this point you are better off following post 16 above which just directs you to install some hard-coded dependencies in step 1. I think you have probably already got past that step.
Reiterating … I suggest you add --stable as an argument when you run the shell script to flash the phone.
That would be in addition to your choice of variant (encrypted or unencrypted) - but at the end of the day, if you can complete the flash process at all, you will be in a good position to flash with the variant that you actually want.