today I moved my wordpress website from local place to a real hosting space (sorry for my bad language).
After importing database and moving filesystem (files and folders), I receive this error when I try to open my website:
Fatal error: Call to undefined function is_wp_error() in /home/mhd-01/www.bresciamultiservice.it/htdocs/wp-includes/load.php on line 368
Can anyone help me? I would not re-install wordpress and re-create posts and pages, thank you so much!