This error is generated in wp-login.php , it happens if server is unable to set cookies, this can happen due to several reasons, one of the common issue is: output being sent before setting up of cookies.
Try out following options:
- Update WordPress core, if it is not up to date
- change theme, if you are using custom theme
- If issue still persists, rename plugin folder
- Also check error log, errors may not be printed to screen.
Related Posts:
- WordPress Admin login redirect to homepage
- Why does WordPress use cookies for /wp-admin and /wp-content/plugins for non-admin users [duplicate]
- Why does WordPress require a ftp server to be running on the webserver to transfer plugins?
- Cannot access wp-admin after disabling all plugin
- Why is my staging subdomain not sending wordpress_logged_in cookies?
- How to save generated JWT token to cookies on login?
- Login cookies set as wrong domain
- WordPress unable to write files in the server
- force logged in user to stay in the dashboard
- wp-admin will not redirect to wp-login.php
- Plugin (smart archives reloaded) crashed site / no access on admin panel
- How to resolve these findings from security audit
- Stop the user if login from the cookies
- How to Add a Third Level Sub Menu to the WordPress Admin Menu
- How to export comments in WordPress?
- Login with OpenID, similar to Stack Exchange sites?
- How can I make an Ajax login form work with FORCE_SSL_ADMIN enabled?
- How to stop wordpress from changing default .htaccess permissions to 444
- Disable saving comment details (name, e-mail) in cookie?
- WordPress Admin is displaying Not Available
- Plugin: How to make links in admin page open up inside of the admin panel
- How to remove/hide action links cluttering under specific plugins’ names
- Adding Visibility Options
- Which hook should be used to validate custom form fields on the login form?
- How to create custom LOGIN and REGISTRATION forms?
- Is there any good tutorial to write custom login, registration and password recovery forms? [closed]
- Questions about brute force attacks on the admin username, coming from amazon IP addresses
- Why would WP-CLI and WP Admin show different list of plugins with updates?
- How could I execute my plugin just in frontend (not in backend)
- Use WordPress with a custom OAuth2 provider
- Can’t see login page after migration
- How to import 55k images (uploaded via FTP) into WordPress Media libary? [closed]
- Custom height/width for thickbox in WP Backend
- Hide Theme options and Customize Admin menu
- Can I upgrade plugins via FTP?
- How can I create a plugin installation link?
- Force [wordpress_social_login] shortcode to display where it is embedded [closed]
- How to provide a plugin which requires CMB2 (plugin dependencies)?
- Plugin upload to install
- Change the backend language of a single plugin
- How can I force users to a particular subdomain to log in for MU (Multisite)?
- Show an image in my header.php
- “Request has expired” with “Make your site social” (Gigya) plugin
- WordPress Keeps Logging Out – What Tests Can I Run to Solve This?
- Linux Permissions and Ownership for WordPress
- Facebook Messager Plugin
- Is it possible make a back-end for WordPress with WordPress?
- Create tabs in admin options page from custom post type loop
- Remove ‘Check Compatibility’ from Plugins menu
- Add menu page issues (permissions & position)
- How to use login_redirect with a user capability
- Cannot access my wp-admin after installing Gzip compression [closed]
- easy steps to make front end form without plugin
- Plugin settings won’t save changes
- Is there any way to make myself an admin?
- Too many login attempts
- Odd /wp-admin/admin-ajax.php entries showing in Wassup
- Custom Login Page — wp_signon Headers Already Sent?
- Is there a plugin for WordPress for creating ‘Accounts’ where all users who belong to that Account can only see Account data? [closed]
- WordPress Site is Broken, Cannot see wp-admin page [closed]
- How to remove a CPT Menu from the Root Admin only
- Cannot access WP admin because plugin returns 204
- Install old version of plugin from admin panel?
- login in wordpress using gmail account
- Janrain/Simple Modal under Redirected Domain
- Help with accessing wp-admin page and resolving error messages
- Codeless random token generation to pass into multiple tracking links in a single page load
- Cookie value changes back to previous value after changing
- Warning: call_user_func_array() expects parameter 1 to be a valid callback, function
- Can we hide a certain user in WP?
- How to properly enqueue jQuery knob on WordPress without conflict?
- WordPress Dashboard add user password not working, etc
- Add custom WordPress admin page with pretty url via code
- How to find where an image is used by it’s url
- Admin menu hilighting wrong item for CPT
- How can I show login popup when user clicks on download button
- Using any plugin results in http 500 error (and only plugins)
- Not able to upload Plugins/ Theme from Admin backend
- Implementation to count page visits of unique visitors based on a cookie
- WordPress FTP/media directory permissions problem?
- How can I save cookies to members
- Plugins effecting layout & login
- Ajax return 0 in plugin – ajax only used in wp-admin
- How to add php stylesheet to admin section instead of admin_head hook
- Adding a Filter to Sidbar Login Plugin to Change Login Button Lable
- set cookies for my whole site is not working
- HTTP Error 403 When Trying to Login
- What plugin(s) are best for this User registration task? [closed]
- Trouble Removing Plugin [closed]
- How do I to override login redirect on specific pages?
- Get post id in Post Page within Wp-admin
- AdBlock blocks my non-advertising sidebar images [closed]
- Screen Options drop-down does not show
- Undefined constant error in pluggable.php
- plugin translations not reflected in admin dashboard
- How to display content depending on the Woocommerce Product Category
- Allow direct access to files/folders within WordPress to replace wp-admin
- WordPress Homepage Login
- I cannot login after installing the wp-login timeout setting plugin
- WordPress website is redirecting on some different shopping page