I am having the same issue but mine says HTTP error. Am in process of contacting my hosts but wondered if I haven’t done something really obvious! Thanks for your help in advance.
Thank you – In the end I just uninstalled and reinstalled through my host. Have learnt that I need to back up my files in future before I try to do any updates! Good job I didn’t have much on there yet.
I got
Fatal error: Call to undefined function get_taxonomies_for_attachments() in D:\hosting\10106030\html\wp-admin\menu.php on line 67
any help please?