[Chris Parsons]

I've had this happen quite a bit to me and never really any explanation for it so, if it happens to you as well from time to time here's some troubleshooting steps you can take:

If you're encountering an 'Error loading. Tap to retry' message in YouTube for iOS, it may be related to a variety of issues, including:

No network connection
Recent changes to your account (For example: Password change)
To resolve this issue, please try the following troubleshooting steps:

Sign out of the app
Uninstall and reinstall the app
Disable and enable your network connection
Switch to a different network connection (For example: Wi-Fi to 4G)

All seems a bit obvious but sometimes the obvious isn't always, well, obvious.

[taz323]

Thank you for the heads up.

[Jaguarr40]

I have found this advice to be true with quite a few apps and it certainly resolves the issue. Thank you for the info.