1. Can you check if both live and staging is using the same PHP and WordPress version? Also, is that the result where the site doesn’t load at all on staging?
2. Yes, you can run restoration for Uploads only. You don’t have to select all components all the time. You can only select the component that you wish to restore.
To do that open the ‘expert settings’ section of the UpdraftPlus Settings tab, and find the ‘split backups every’ option. Set this to the value that you prefer, save your settings and run a new process.
“Now the site is loading, but there are also different broken image links, so I’m not sure what to make of that. ”
> The uploads did not seem to finish. To fix this, you can manually restore the uploads by extracting all the uploads.zip file and then place them in the “wp-content/uploads” folder. The database restore will not fix the issue.