Hi, when I try to create a new file/drawing in Krita, the whole app Crashes. Is this a bug? Please help. Thanks.

You'll get a better response if you go to https://krita-artists.org/ (sign up and sign in needed) and create a topic there in the General Questions category.

Say which version number of krita you're using and which operating system.
Also, how long you've been using krita and if this has started to happen after any significant changes to your computer.
Can you open an existing .kra file or even a .jpg or .png file and work on it?