In this tutorial, we will solve a common problem in Sketchup software.
This problem appears when your file is heavy.
The project file is mostly in loading mode.
The reason for this is auto save.
By default, it saves your file every five minutes.
But what is the solution?
In the window section, select Preferences, and in the General section, you can turn off auto save, or I suggest choosing a higher number for it, such as 20 or 30.
Now your file is out of loading mode and loading mode happens once every 20 or 30 minutes or whatever amount you set.
Good luck