hi,
glad to hear you found it out

was about to tell you to ask ie not to display "simplified" error message in order to know a bit more about the 500 error which is a servor error often due to htaccess or script
now, just to explain that htaccess stuff (that doesn’t prevent the page from showing

)
the url rewriting enables MODx (actually, the server) to understand that www.yourwbesite.com/this/that/an-alias means www.yourwbesite.com/index.php?id=25
that’s why it excludes the /assets directory from the rules as www.yourwbesite.com/assets/images/yourimg.png... really "means" www.yourwbesite.com/assets/images/yourimg.png and must not be interpreted as www.yourwbesite.com/index.php?id=32... you see
have swing