My phone galaxy s9+ recently cannot open the YouTube home page but it open trending after opening trending I can go to home page but cannot open YouTube home page when I click on YouTube app.
Are you using YouTube app or accessing YouTube through the browser?
If using YouTube app, then try this:
Tap and hold YouTube app shortcut on your home screen. The when context menu appears, tap on App info. Then go to storage and clear cache first, if didn't help clear data from the same place
Have you made sure there are no updates for the app? This is definitely strange I can't even find an option in the Youtube application that would make it default to trending instead of the home page.