Figma Plugin/Widget API Access Blocked (403 Errors) - "An error occurred while loading the plugin environment" in Flutter Plugin

Dear Figma Team and Community, I'm encountering an issue preventing the Flutter plugin from working.
When attempting to use the plugin, I receive the following error: "An error occurred while loading the plugin environment"

When I look at the developer tools I see that requests to the Figma API are being blocked with 403 errors. Specifically, these endpoints are affected:
`https://www.figma.com/api/plugins`
`https://www.figma.com/api/widgets`
Both requests return a 403 "Request blocked" error generated by CloudFront.
Example CloudFront Request IDs are: 
B0KxQIDEzIcouCe83YY6a8EZP7mRysS8K1X2QB86eH2s-VffQAeIaQ==
9UycUOv8GwzvNwUBy53u0ZyepNoQF_pRriuz-AOI0OUmFxgErda7iw==

Crucially, I am operating behind a proxy server. This is likely a contributing factor, but I need guidance on how to configure my environment (or the plugin) to work correctly. The CloudFront error suggests potential traffic overload or configuration issues, but given the proxy, I suspect the issue is related to how the plugin/Figma API handles proxied connections.