[T800]

I think there must be something up with the service.

I made my first skill but accidentally did it in U.S. I couldn't alter the region so I opened a side tab to it and started a UK one. None of the settings on the second page will save.

If I try adding a slot type I get no save button available only for the whole page. If I press that it says "Error: Please provide both name and values for the custom slot type." it's like it's not picking up on what is being typed in the "Enter Value" box

It's not working how it was on Wednesday or Thursday morning. I even tried the Echo google skill on youtube and that's the same.

I've tried multiple browsers

It's probably easier to just create a new (additional) Skill and try again. The language setting is very strange, I have found in the past that when I created a US English skill by accident (as it is the default setting) it would cause constant problems when I tried to change it back to UK. The only way to fix it is to start a new Skill. The Skill bit is the easy bit anyway

For the custom slots, again it is a bit strange in the way it behaves, but it does seem to work when you start on a blank Interaction Model page and create the custom slots BEFORE the intent schema or utterances.

You're right, I deleted it and now I am able to access the save button but now it just says:
"Please wait while this Alexa skill is updated..."
That has been spinning now for 20 minutes