SITERIP needs read/write access to certain directories. On Linux, this is often /tmp/siterip_cache/ ; on Windows, C:\ProgramData\Toticos\ .
Only use this as a diagnostic step. Update the CA certificates for a permanent fix. Toticos Com SITERIP Fix
Cloudflare Images, Imgix, or even a simple nginx image_filter module can replace the image handling aspect of SITERIP. SITERIP needs read/write access to certain directories