I do apologize for necroposting, but I’ve been encountering this issue on and off for months (including having it happen again right now) - even having to reinstall Windows entirely once to fix it. A few months back, using Credential Manager within Windows to manually delete the login auth token worked (although a hard uninstall and reinstall as recommended by the help page has never worked for me) - however, as of today, that appears to no longer work.
This issue appeared for me today. This is affecting my work, I am completely incapable of using Roblox Studio. I have reinstalled, no avail. Log file shows that I am getting a timed out message for authenticating, and a 401 Unauthorized for retrying attempts.
Can also vouch that the issue has been affecting myself as well. I tried various things such as reinstalling, logging into different accounts, opening up a place file in hopes that it would maybe bypass the login, and even attempting @maxlovescat22’s solution. We can only hope that Roblox knows this is an issue lol
Select the version as the second latest one which should be from March 27 or around that.
Tick Force Reinstallation
Press Launch Studio
After this works, you should uncheck Force Reinstallation for the next time you will be opening it.
Next time you want to open studio, open the mod manager and tick Only Open Studio Directory and press Launch Studio and it should open the directory and from there you should just create a shortcut for the application for studio that you find on there if you haven’t already.
This takes long to do and is time consuming.
Roblox should really hurry and and fix this as it affects a lot of people including myself.