I’ve also gave one solution on another post which has worked everytime for me and takes less time.
1- Reboot your computer
2- Once logged on to your computer, you have to open Roblox Player first, before opening any other softwares/browsers. Wait for the app to open.
3- Play the game you want
Similar devforum posts on this issue: Having to reinstall roblox every time it updates
Roblox’s official article: https://en.help.roblox.com/hc/en-us/articles/203312870-General-Desktop-Roblox-Issues