Error 500 when trying to access to the menu section

Hi, i’m having a really bad time trying to figure out why i cant access the menu pages ( from the web, not admin ), i recently changed the “general wordpress url” and then i got the 500 internal server error, i tried fixing it from myphp, after that i was able to access the main page but not to other menus from it ( i have 3 and none of the works ) everyone drops the internal 500 error… sorry for my english i’m not native :/ !

thanks for your time !