So I am very new to this community but I've been using Krita for years now.
I've never really had an issue before until this year when I started getting a window popup
stating there was an error for autosaving with the reason section left blank.
This window will popup several times in the span of a minute or two and it's really disrupting my work.
I've also noticed that I can't save files under the same name I have to save a completely new file every time.
I have a surface book and a wacom intuos tablet, if that helps.

"I've never really had an issue before until this year ..."

So, what happened this year? Did you get the surface book this year? Have you changed the OS? Has the OS had a major update? Did you update krita to a new version? Have you set up a new account to use on your computer? etc.

Hello, you can maybe disable "Show on-canvas popup messages" in the settings.