With any injury, I always recommend resting and seeing a doctor if pain persists. However, here are some knee-friendly mobility videos in the meantime. I would recommend doing at least one of these 3 videos daily. They are all super short, but I think you'll notice a difference if you remain consistent in your practice.
8 Min Ankle Mobility
10 Min Hip Mobility
Week 01 | Bands Challenge Video
You can find all of them by using the "Search" section or search bar on the app.