Well I obviously can't copy and paste from the phone to the computer but I did check and double check the original post, performed the process again from scratch as above and just completed it a fourth time with exactly the same result, so I'm confident that I am typing the code as it appears from the unit.

lWki8yzuDks4

I understand that the part BEFORE the COLON is not relevant, so I've removed that entirely above. The only other thing I can think of is that the first character is a lower case "L" and clearly not an UPPER CASE "i" nor a NUMBER 1.

I can think of no other reason there would be an issue.

I'm sorry you are having difficulty, if there's any thing else I can try please do let me know.