I am at my wits end with the following problem:

My site [www.sebastianthalhammer.com](https://www.sebastianthalhammer.com) is available under that URL without any problems.

However Google Search Console as well as other external third party test tools return a 404 error. 

[Status report from Uptrends](https://i.stack.imgur.com/QGfow.png)

It is just the main page that's affected. All the other subpages and blog content isn't affected. 

I have been in contact with the server stuff but it seems alright to them. As mentioned. The site can be reached. The site runs on wordpress - latest version.

I have no real clue where to start as this error seems to be quite a tricky one. Does anyone here might have an idea what's going on?

Sebastian