How to fix error rank math on wordpress 5.4

Hi,

Thanks for getting in touch with us.

Please hit the enter key after you are done typing so that the focus keyword is saved and changes BG color.

Add a Focus Keyword in the Classic Editor: https://i.rankmath.com/PMGTIW
Add a Focus Keyword in Gutenberg: https://i.rankmath.com/vcTxyk

Hope that helps and please do not hesitate to let us know if you need our assistance with anything else.

We might need to take a closer look at the settings. Please include your WP logins in the designated Sensitive Data section.

It is completely secure and only our support staff has access to that section. If you want, you can use the below plugin to generate a temporary login URL to your website and share that with us instead:
https://wordpress.org/plugins/temporary-login-without-password/

You can use the above plugin in conjunction with the WP Security Audit Log to monitor what changes our staff might make on your website (if any):
https://wordpress.org/plugins/wp-security-audit-log/

We really look forward to helping you.