Can't upload photos to any websites.

Is your Photos Library the System Photo Library?

• Open Photos, open the Photos > Preferences > General.
• Click "Use as System Photo Library", if this option is not grayed out.

Which browser are you using for uploading to the web sites? Not all browsers may be compatible with the Media Browser. Have you tried Safari?

How are you trying to upload to Facebook? Describe the workflow.

Also what version of system and Photos are you running ?

Where is the library located? If on an external HD how is that drive formatted and connected to your Mad?

For future reference: Writing an effective Apple Support Communities question.

I have the same problem. Yes mine is the Photos Library the System Photo Library. I use Safari and I can't upload to Facebook or any other website at all. Appreciate any help.