Errors when installing PLUGINS and THEMES v5.5.3 on Win 10

When trying to install Astra THEME and PLUGINS on LOCAL v 5.5.3 today, I got a number of error messages back related to not being able to get out to site to get theme or plugins (in general) from within LOCAL install.

Despite and ignoring errors, uploading from local disk, install and activations were successful for Astra theme and plugin.

Please advise (re: what I screwed up on).
Thanks in advance.

Theme related errors: theme page screen capture v5.5.3 Win 10

Plugin related errors when clicking new plugin: plugin page screen capture v5.5.3 Win 10

Got similar error list as with theme, after clicking install theme.