I am looking into the issues with the premium/images server.
Edit: it appears to be an issue with our host, they're having network issues.
Edit 2: everything appears to be back up now.
Regarding erroneous account expired messages, it seems this happens if you requested a trial account while already having an active Premium subscription. This could have happened a while back, but the new version of the Android app treats subscriptions a bit differently so the issue is only appearing now. If it's happening to you send me a PM and I'll fix it.
Edit: it appears to be an issue with our host, they're having network issues.
Edit 2: everything appears to be back up now.
Regarding erroneous account expired messages, it seems this happens if you requested a trial account while already having an active Premium subscription. This could have happened a while back, but the new version of the Android app treats subscriptions a bit differently so the issue is only appearing now. If it's happening to you send me a PM and I'll fix it.