error page displaying

When I add a URL of a plugin from the WP plugin repository (like samples below), I get an 404 error “page not found”. If I add an exact plugin name, it works just fine as it always has.

This just started today, it has been working fine up until now.

I have tried this on several different blogs, both 4.23 and 4.24 and all get the same response.

Anyone have the same experience or a solution?

https://downloads.wordpress.org/plugin/contact-form-generator.zip
https://downloads.wordpress.org/plugin/wordfence.6.0.15.zip

Thanks

https://wordpress.org/plugins/multi-plugin-installer/