This does not appear to be a confirmed known issue with the latest WordPress update. A 500 error indicates a server-side failure, most likely in the custom REST API, plugin, or PHP code handling the claims request.
Since caching and .htaccess have already been ruled out, I’d recommend checking the WordPress/PHP error logs and the failed REST API request in the browser Network tab to identify the exact cause.
Okay. When i tried earlier it was working now it’s blocked.