Recently I took over a website and have been working on to make it better for past couple of days.

Today I accidentally overwritten my .htaccess file, and I have no idea what it had in it.
After I click on any button which is supposed to link me to a subpage, it shows the correct url but still displays the content of the main page, instead of loading the included text into the main <div>.

Has anybody got an idea how to fix this issue?