Hi@"Bazooka99", welcome to the community.
Unfortunately, if the hint is blank it means nothing was entered the last time you changed your Master Password.Remember, the master password is 12 or more characters long and has at least one upper and lower case letter, number and symbol. It is also case sensitive so you may want to type it out in a text editor to check exactly how it is being entered.
Hi@"Bazooka99", thank you for the follow up. I have not been able to recreate this issue with my own accounts so far, but I am sharing this with our team. If we are able to recreate the issue we will open a bug ticket.