This does seem like a corrupt WP core with missing files. You can attempt to repair it by uploading a fresh copy of core in place. The procedure would be along the lines of Manual Update documented in Codex.
However I want to note that pieces of WordPress core don’t just disappear for no reason. You might have been hacking, affected by server issues, or something else entirely. The request to hosting support to look into situation would definitely be wise.
Related Posts:
- change Dashboard default page on login
- User registration followed by automatic login
- How to fix the admin menu margin-top bug in WordPress 5.5?
- Adding “Remember Me” in custom login
- Hide php Notices in Dashboard
- How to change the wp-login.php page title?
- How build a custom login/register form with error handling?
- Change the footer text on the login page
- Changing user_nicename
- Add value to usermeta without removing previous values?
- WordPress 4 invalid username special charachters issue
- How to place login logout link on menu that redirects users back to current page?
- How to turn off redirection from ‘domain.com/login’ to ‘domain.com/wp-login.php’
- How to resolve error “Cookies are blocked due to unexpected output.”?
- Using a nonce in a Custom Login Form
- Constructing a custom login form using ajax
- automated tests as a user?
- Remove username in emails or swap username for email
- woocommerce and is_user_logged_in() if not redirect to homepage
- Check if user is logged in when clicking certain links on certain pages
- PHP If user is logged in & on home page redirect
- WordPress shows registration link for non logged users
- Creating login session via CURL
- syntax issue on php 7.4
- Admin username and password
- Recovering WP Login Credintials in Code?
- Show comments menu in dashboard only if the site has comment
- Is it necessary to sanitize wp_set_password user input?
- WordPress custom login form using Ajax
- Remove one value in dismissed_wp_pointers?
- How to give new users two specific user role options upon WordPress user registration
- Wp-login appears White Screen, Error: Cannot modify header information
- How to: PHP Log Out Link?
- Login/logout in header
- Why is my cookie not unsetting upon logout? [closed]
- User management system similar to wordpress one?
- remove wp floating submenu in wp dashboard
- Programmatic Login from 3rd Party site
- Cannot access wp-admin (wordpress dashboard)
- Cannot access wp-admin/wp-login.php (WordPress backend) anymore, what could be wrong?
- Dashboard broken into list of links
- How to debug my custom login form looping intermittently
- WordPress admin pointers tour bug?
- getting logged in user info (wp-load.php) from parent directory
- Problem with login form
- Login to wordpress by clicking a link and specifying usernaname and password in url
- Log in / Log Out Custom Button
- Should `wp_login` be used since it’s deprecated?
- How to redirect users based on role and content of redirect_to?
- Change CSS based on is_user_logged_in
- How to display login form anywhere, when user isn’t logged in, without redirecting?
- How can I open up my administrative panel to everyone?
- How to create a field in customize and show that in header.php?
- How can I add a new row in a separate database when someone registers via WordPress?
- One account with multiple logins
- Lost in trying to create user database system
- Shortcode to log user into current URL
- How can I display Custom Post type Custom Columns and its Content in a Dashboard Widget?
- Warning: call_user_func() expects parameter 1 to be a valid callback, function
- I installed WordPress locally now how do I login?
- If user is logged in not working
- Processing ajax call to php to insert into mysql database
- Change homepage content if user is logged in – BuddyPress
- How to debug failed changes to posts?
- Show login greeting above sub-menu links?
- is_user_logged_in returning nothing on custom page
- Help with accessing wp-admin page and resolving error messages
- Is there way to toggle the publish date display?
- Removing “There is no account with that username or email address.” error message in “/wp-login.php?action=lostpassword”
- Can’t log in to WordPress wp-admin after adding code to functions.php
- Creating plugin with front-end pages
- Check if user had autologin & if so, logout
- Admin Panel 404 Error after login
- PHP warning – Use of undefined constant ‘FORCE_SSL_LOGIN’ ‘FORCE_SSL_ADMIN’ on wp-config.php
- How to block specific user id in custom login form?
- Log out without confirmation request (nonce)
- Adding button to wordpress menu
- Adding a sidebar to wp-login.php
- List users in a dropdown for login
- Not logged in when using http
- add bootstrap modal after login in wordpress
- White screen after login attempt
- Catchable fatal error in appcloud free theme by Tokokoo
- Redirect users not logged in to the standard login page (and back) from some posts and pages
- How to replace wp-admin login page to another location?
- Check user last login date
- Prevent users from display default wordpress login form
- login redirect based on user role not work as expected
- Redirect users by role to custom pages
- How to change wp-admin and wp-login urls
- How do I do so that people can register on my wordpress site?
- wp_login_url always redirects me to wp-admin
- I can’t log into my website , it says “Error: Cookies are blocked due to unexpected output”
- Error when loading Dashboard
- using custom pages for myaccount in woocommerce
- change div text and link for logged in users
- wp-login – unable to redirect user to a custom login url
- Redirect to current URL and append specified URL parameter on unsuccessful login through Elementor login form widget
- How to add input field value to Users in WordPress Dashboard
- Can’t programmatically log user in php