Failed to fetch plugin cordova-plugin-purchase via registry

Plugins
1

hi…,
i want to build my IOS apps and there is i use cordova-plugin-purchase plugin.,
but whent i try to upload zip file and processing the build.,

showing this error

UserError: Error: CordovaError: Failed to fetch plugin cordova-plugin-purchase via registry. Probably this is either a connection problem, or plugin spec is incorrect. Check your connection and plugin name/version/URL. This could be caused by a problem with a different plugin.

this my config.xml

    <plugin name="cordova-plugin-purchase" source="npm">
        <variable name="BILLING_KEY" value=###" />
    </plugin>
2

I’d start by getting your plugins up to date. For cordova-plugin-purchase, you’re using 9.0.0. The current version is 10.5.3.

I chose another at random. cordova-plugin-browser is set to 1.3.0. Current version is 5.0.0.