Check the box beside Always allow www.roblox.com to open links of this type in the associated app, and click on Open Roblox It should fix the issues you are facing with the white screen on Roblox ...

ROBLOX gamers are battling to access the platform following a server outage. More than 250 gamers have logged complaints on the Downdetector website, which measures outages, since 3pm this afternoo… ...