I tried contacting support using the contact form (link), but that form is broken and doesn’t allow me to submit. I tried with both Microsoft Edge and Google Chrome.
It would be great if someone from the technical support staff could assist me.
Under your Gmail address you are admin for your subscription, which is why you see it in your account. Currently the subscription isn’t assigned to anyone, not even you. Go back into the account, Members section, and look for you in the list. Click the three dots on the right, and choose the option for changing your role. Make sure that you are assigned to use the subscription.
After doing that you may get away with closing and reopening SketchUp, or, sign out and sign in again. Then you should see the subscription as being active.