It's been about 16 hours for me and it still can't verify???
I had the same issue and the solution that worked for me was placing the code right below the <head> tag, towards the top of the theme.liquid code. It didn't work for me when I added it just above the </head> tag.
worked for me!
Like many others here, unfortunately this doesn't work for me
Have the people who struggled to get it verified, verified it now? Because I’m struggling now
Just wanted to pop on to say that uploading the code right below <head> also worked for me. It didn't verify straight away but I left it overnight and it had verified when I checked in the morning