Google Blogger and bX-tsn23x

I was recently about to change the name for one of my Google blogs, but I always ran into an error message. Here´s what I tried and how I could finally change the name.

The error message was the following: "Whoops, that´s an error! (bX-tsn23x)". The message appeared shortly after I changed the name of the subdomain of the Google blog. Sometimes I could change the name for a few seconds until it was changed back again.

Here´s what I tried:
- removing all the Chrome browser cache
- opened in the Internet Explorer/Edge
- opened in an incognito windows

It did not solve the issue: But then I found a better idea!
To open Blogger in Draft Mode. ==> https://draft.blogger.com

I changed the name again and it remained. I could open the new page name without issues now! And that´s it. Good to know.