Buy ROBUX in game gives a constant web error

I didn’t have enough R$ for something in game and I accidentally clicked buy R$ instead of cancel and this happened

I can literally not close this yes/no/red x in the end I had to force ROBLOX.exe to close

Is the ROBLOX.exe browser even used any more? Clicking my ROBLOX Player start menu item just opens the games page in Chrome.

I suspect both the bug and error dialog being unclosable are due to ROBLOX.exe embedding some ancient version of IE.

EDIT: Oh, this is what opens up if you buy ROBUX for a transaction, isn’t it. Silly me.