Trying to install Weaverbird- Package Restore: Could not create SSL/TLS secure channel

[wim (Wim Dekeyser)]

Hi -

@jamesfoo.w510

Rhino plugins that do not ship with Rhino
C:\Users\James\AppData\Roaming\McNeel\Rhinoceros\6.0\Plug-ins\Lumion LiveSync for Rhino (839d6175-32d1-4ffe-a0a4-b7fb43cf0ff5)\2019.11.5.949\Lumion\Rhino 6.0\LumionPlugin.rhp “Lumion LiveSync for Rhino”

I would try disabling this plug-in and restarting Rhino.
Apart from that, there’s a file in the following post that you could try:

Weaverbird Missing Plugins

@rpatanav, try opening the attached Grasshopper file before opening the weaverbird file. tls12_fix.gh (3.0 KB) Can you run the _SystemInfo command and send the result? I’m curious to know which third-party Rhino plug-ins you have installed as I think one of them might be triggering this problem.

-wim