Account subpages are empty

Hey there.

When visiting my /account/ page the content is shown as intended. However, when visiting one of the subpages (/account/general/, /account/password/ etc.), it seems like the ajax call is just returning empty content.

When I visit the subpages directly it is working as intended, but when clicking the menu between them, no content is shown. The menubar on the left is rendered, but has css opacity 0 – the right hand side of the content with the settings for the different subpages are not shown at all.

What to do? Can I disable ajax and just go regularly from page to page?