Microsoft To-Do Crashes when I try to group by category

I cannot organize my flagged emails into categories in the To Do window; it shows a blank screen (Crashes) when I select Group by Category.

What I want to see it similar to classic Outlook in that the To-Do window would be the same as Tasks, and I can categorize my emails per category. For example, if I mark emails Urgent not important, Important, not urgent, Not urgent not important and Urgent and Important - I would like to have them sorted into those 4 categories, and I should able to select what category goes to the top of the bottom.

When I open the Outlook-new version, I should have the option that every time I click on To Do, it open by default on flag emails, not on Tasks that it is currently on