Hi there! I understand that you're having trouble exporting your projects from Vixer, even though you have a full subscription, a stable internet connection, and plenty of space. Let's work through this together.

1. Check for App Updates: Sometimes, app issues can be resolved with the latest updates. Make sure that your Vixer app is up to date. You can do this by going to the App Store on your iPhone, searching for Vixer, and checking if there's an update available.

2. Clear Cache: Clearing the app's cache can sometimes resolve export issues. Though iOS doesn't have a specific "clear cache" option like Android does, you can try restarting the app or even rebooting your iPhone. Here’s how to restart the app:
- Close Vixer by swiping it up from the app switcher.
- Then, re-open it from your home screen.

3. Reboot Your Device: Restarting your iPhone can help clear temporary glitches that might be affecting the app. Just hold down the power button and slide to power off. Wait a few seconds, then turn it back on.

4. Check Export Settings: Sometimes, specific export settings may not be compatible with your device. When you attempt to export, check if there are any settings that need adjustments, such as resolution or format.

5. Try Different Wi-Fi or Data Connection: Although you mentioned your internet is fine, it's worth trying to export while connected to a different Wi-Fi network or using cellular data, just in case there's a connectivity issue.

6. Storage Space Check: While you mentioned having plenty of space, it doesn't hurt to double-check if your iPhone has enough free space to handle the export. You can do this by going to Settings > General > [Device] Storage.

7. Reinstall the App: If the above steps don’t work, consider uninstalling and then reinstalling the Vixer app. Just make sure to back up any important project data before doing this.

If you've tried all these steps and are still having the issue, let me know, and we can explore further options or escalate the matter. Are you satisfied with the solutions I provided?