My WP blog stopped working properly

today when i tried to add new post i found out that i cant add a multimedia or changing the post date or almost changing anything clickable … when i click on any bottom nothing happened its like its not connected to a function .

also when i visited my blog site i discovered that the categories are not working properly.

i have no idea what just happened

my blog site is offerat.com/jo

please some help.

Regards