Hey there! I see you're having trouble logging into the TwitchCon app, and it's showing an error about not being able to load your Twitch identity with the code 750650503. That definitely sounds like something we want to get sorted out quickly.

To help me better assist you, can you let me know:

- Are you trying to log in using your Twitch account credentials?
- Have you recently changed your Twitch password or enabled two-factor authentication?
- Have you tried logging into Twitch itself via a browser on your Windows device to confirm your credentials work there?
- Did this issue start suddenly, or has it been ongoing?

In the meantime, here are some first steps we can try:

1. Clear Cached Data: Sometimes the app might have cached info that's outdated. Try clearing the app cache and data if possible, or uninstall and reinstall the TwitchCon app.

2. Check Network Connection: Make sure your Windows device has stable internet access and no VPN or firewall is blocking the app’s connection.

3. Login to Twitch Website: Open a browser on your Windows 10 machine and log in directly at twitch.tv to confirm your credentials and see if your account is active.

4. Reset Password: If you can’t log in to twitch.tv either, try resetting your password from their login page.

5. Check for App Updates: Make sure your TwitchCon app is up to date; sometimes login issues can occur with outdated versions.

If you've already done any of these, just let me know, and we can try some deeper troubleshooting or look into backend support options. Does this match what you’ve experienced so far?