This error means a security plugin turned off WordPress Application Passwords - the feature apps use to connect. Here is how to turn it back on, plugin by plugin.
WordPress Application Passwords let apps (like the wptaskify connector) authenticate without your real password. A security plugin - Wordfence, Solid Security (iThemes), All In One WP Security, or a host-level rule - often disables them. Re-enabling is safe: application passwords are scoped and revocable.
Some hosts disable them via a must-use plugin or filter (wp_is_application_passwords_available). Ask your host to re-enable application passwords, or add a snippet that returns true for that filter.
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