Error 500 when creating a new page [Wordpress]

Dear support team,

I have an issue when I am creating a new page on wordpress.

i have migrated my website from local to your hosting service, the homepage is perfect but then when I create new page on my wp admin panel online, the link won’t work.

here is the website: http://soexportdemo.rf.gd/

Thanks you very much and best wishes for 2018,

Clment