When using Cloudflare or other proxies the signature error can occur, fix it with these commands

Modify the Backup task using the API

1. Find your task ID

midclt call cloudsync.query

This dumps JSON for all your cloud sync tasks. Look for the one you want and note its "id" field near the top of that block.

2. Update it with the flag

midclt call cloudsync.update <task_id> '{"args": "--s3-sign-accept-encoding=false"}'