It may depend on how it is that you own SketchUp. I don’t see any classic license for you, or any Pro subscription, so I’m not sure which is the right way for you.
If you have a subscription, and you got that through your local reseller or distributor, you would contact them for help. They would try their own suggestions, and if they get stuck they can directly contact SketchUp Support for help.
If you have a subscription directly with SketchUp, or a Classic license, you would enter the details of the problem on this page:
If you go to that page in a private browser window you will see that the Message Us part is grayed out. So, make sure to go to that page in a normal browser window, after having signed in to sketchup.com using the email address associated with the Classic license or the Pro subscription. The option should be available then.
In the case where you don’t appear to have at least a Shop subscription, you will be asked for the serial number for the Classic license that you own.
See if one of those options gets you through to the technical support form.