Pages without individual URL/Permalink

Hi there
this is my first support-ticket, i am a bit nervous.. :wink:
Hope you can help.
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Situation:
This Domain (http://www.manuela-mueller-yoga.de/) is being redirected to this webspace (http://www.der-eichholz.de/manuela_mueller/ ). Here lies the WP-installation. I did this before and i didnt experience this kind of problem until now.

Problem:
There are no indiviual URLs for pages or posts and when you relaod a page you always end up on home. Therefore its impossible to link to a specific page or post or implement a share/like-functionality per page/post (costumer-request).

Is there a way to fix this and get individual URLs for all pages/posts without reinstalling or database editing (which i might do, if necessary)?
I already granted support access on my WP dashboard.

Thank you in advance!

sascha