Howdy PRLTC,
If you change the password to your iCloud account there are a number of places that need to have settings changed. This article gives a good list - What to do after you change your Apple ID email address or password.
Specifically -
Update your Apple ID or password on your iPhone, iPad, iPod touch, Mac, PC, and Apple TV.
...
Choose Apple menu > System Preferences, then click iCloud.
- If you're signed out, enter your updated Apple ID or password to sign in. The data in iCloud will automatically appear on your device after you sign in.
- If you're signed in with your previous Apple ID:
- Click Sign Out. Depending on what iCloud options are turned on, you'll be asked if you want to make copies or delete iCloud data (Contacts, Calendar, Reminders, Bookmarks, Photo Stream) from your Mac. Your data will remain in iCloud and will be updated on your device when you sign in to iCloud again.
- Enter your updated Apple ID or password to sign in.
Thanks for using Apple Support Communities.
Best to you.