The url works OK for me as well as Simbrief import in other aircraft. But with the A310 I always get "pending" even with empty community folder and no other FS apps running.
Specs: Win 10, AMD Ryzen 7 3700X, 16GB RAM, AMD RX5700, MSFS MS Store (not using beta), Navigraph Unlimited subscription, AIRAC 2211 rev2