Our website (lien caché) has suddenly stopped working and is returning an internal server error (500). The homepage will sometimes load (probably cached), but all other linked pages fail. I initially thought that might be a webserver problem so I contacted our webhoster, but they told me that it is a WPML related issue (potentially misconfigured .htaccess). Nobody from my theam has edited the .htaccess however so I'm not sure what to look for even.