Solution:
1. Click on the "Cog" icon in Safari.
2. Click Preferences...
3. Change to the Security tab.
4. Select "Only from sites I visit" or "Allow".
5. Close the dialog using the cross.
6. Shut down all Safari windows and then re-open Safari
1. Click on the "Cog" icon in Safari.
2. Click Preferences...
3. Change to the Security tab.
4. Select "Only from sites I visit" or "Allow".
5. Close the dialog using the cross.
6. Shut down all Safari windows and then re-open Safari