Nishat Shahriyar

Okay I finally craked the solution. Its FireFox problem, Used Chrome and now it’s working!

No, it’s showing from the 3rd party tool I am trying to connect to my WP site using WP application pass manager.

When ever I try to add 3rd part service to my WordPress website using WordPress Application Password Manager, it showing Failed to verify. My username and the application pass are not working.

While debugging from browser, it showing this error:

Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at https://mywebsiteurl.com/wp-json/wp/v2/categories?per_page=100&page=1. (Reason: header ‘user-agent’ is not allowed according to header ‘Access-Control-Allow-Headers’ from CORS preflight response).

Firefox sending me to this page- https://developer.mozilla.org/en-US/docs/Web/HTTP/CORS/Errors/CORSMissingAllowHeaderFromPreflight?utm_source=devtools&utm_medium=firefox-cors-errors&utm_campaign=default

but I know so little about this. How can I update the server?

I tried downgrading my WordPress, not worked. Deactivated all plugins, not worked. Turned mod sequrity off for domain, not worked.

I deactivated all plugins, then tested. Also tried downgrade my WordPress, does not work.

When I tried to use the my user name and newly create application manager pass it showing – “Failed to Verify” message. I tried multiple times carefully. Created passes multiple times, nothing happened.