I have a current subscription, I cannot open SKP, I have an expired subscription status which is displayed
Go to myaccount.trimble.com and check the ‘Members’ section. The email that you use in SketchUp ahould have ‘Product access in the third column. Change if necessary.
Have you tried signing out and then signing back in?
If you have not signed in for a while, sign-out/in might reset the status in SketchUp
I hope this helps