I can't access my sketchup because it tell that many machines are conected, but it isn't

I was using my sketchup all day, when I closed a few program and open again, a message tell me that I need to manager my account. But I only have the program in my personal computer.
What I should do?

You can be signed in on different versions of SketchUp and it would count as a device, even on the same machine.
Deauthorize your devices by clicking on that button and select the products, then click on ‘View included Apps, and then in the SketchUp app, click on ‘Manage devices’
Hit confirm and then back in SketchUp, sign out and back in.