I am using Google chrome on my Samsung Note 20.Yes, it's been broken for at least a couple of days for me too. Some options don't have picture icons, some things you click on and get a message that says "Sorry, there was an error completing your request, try again later". After that it usually won't let you toggle any options and you have to refresh and start over. What a goat rodeo.
EDIT: I replied while you were editing your post. However, I just tried clearing my cookies and still have the same issues.
1.Try shutting down the browser completely.
2.Then reopen the browser, go to privacy and security and clear all cookies for all time.
3. Close out the browser completely.
4. Open a browser and try the build configurator.
5. I had to select each option once and wait a few seconds till the price increase loads at the bottom left, making sure not to click on any options by mistake. If you start changing options around it gets confused and then you have to clear the browser all over again( steps 1-4).
6. Go to the summary and double check your options are correct.
7. Save as pdf and you should be ok.
If you have to change your build at all you probably have to do all these steps all over again.
I'm curious if this works for you, reply back so we know this process works for others