It is the common occurrence that happens with wordpress users while working with the wordpress admin dashboard. Sometimes due to incompatibility or incompatible behavior cookies block the functions of wordpress. In order to fix, “Cookies are blocked or not supported by your browser issue, you need to first check in your browser whether you have enabled the cookies to use wordpress.  It is recommended that you should disable caching and security plugins, and check whether  you can sign in to the dashboard of your wordpress admin.

  

Circumstances behind the occurrence of cookies blocked error

  

If you migrate your website to some other hosting provider with the same domain, then existing cookies will become unsupported to new website

  

When disabling caching and cookies does not work, then you should clear cookies and website data for your browser. Links for different browsers are different.

  

If any of the solution does not work, you need to be more technical to fix the same.

  

You will have to use some code in the function.php file of your website.

  

You can any time connect with wordpress professional in order to resolve your problems

  

Thanks for sharing.