can't connect to extensions marketplace

Issue Type: <b>Bug</b> extensions tab rep message "We cannot connect to the Extensions marketplace at this time, please try again later." VS Code version: Code 1.51.1 (e5a624b788d92b8d34d1392e4c4d9789406efe8f, 2020-11-10T23:34:32.027Z) OS version: Windows_NT x64 10.0.19041 <details> <summary>System Info</summary> |Item|Value| |---|---| |CPUs|AMD Ryzen 5 3550H with Radeon Vega Mobile Gfx (8 x 2096)| |GPU Status|2d_canvas: enabled<br>flash_3d: enabled<br>flash_stage3d: enabled<br>flash_stage3d_baseline: enabled<br>gpu_compositing: enabled<br>multiple_raster_threads: enabled_on<br>oop_rasterization: disabled_off<br>opengl: enabled_on<br>protected_video_decode: unavailable_off<br>rasterization: enabled<br>skia_renderer: disabled_off_ok<br>video_decode: enabled<br>vulkan: disabled_off<br>webgl: enabled<br>webgl2: enabled| |Load (avg)|undefined| |Memory (System)|13.94GB (9.26GB free)| |Process Argv|--crash-reporter-id 716a2efd-7c70-46b1-bf12-42ee7008247e| |Screen Reader|no| |VM|0%| </details>Extensions: none <!-- generated by issue reporter -->