RES Backup conflict with RequestPolicy extension

I'm trying to use the new backup to Google Drive / Autobackup feature for RES & it's conflicting with RequestPolicy Continued. I'm not using RequestPolicyCon't to block anything on Reddit or the redditenhancementsuite.com website, they are both whitelisted. Google / Google Drive is also whitelisted.

When I try to backup to Google Drive with RPC enabled I get the following error "NetworkError when attempting to fetch resource." With RPC disabled it works fine.

• Night mode: false
• RES Version: 5.8.3
• Browser: Firefox
• Browser Version: 54.0.1 (64-bit)
• Cookies Enabled: true
• Reddit beta: false