Hey there sol215,
Thanks for reaching out to Apple Support Communities. I understand you’re having issues installing apps on your Apple Watch. I’ll be happy to help with this.
I you haven’t tried any troubleshooting for this issue, a good place to start is to ensure both your Apple Watch and iPhone are completely up to date:
Update your iPhone, iPad, or iPod touch
Update your Apple Watch
If they’re up to date, restart both devices:
Restart your iPhone
How to restart your Apple Watch
Then try another method of installing apps from these links and see if the issue is resolved:
Get more apps on Apple Watch
Install apps on your Apple Watch
Regards.