How to get ispmanager backup to work on AWS S3?

Question

Backup

The problem is that an error appears in the ISPmanager logs

ERROR AmazonStorage: STEP - StartMultiUpload, CODE - SignatureDoesNotMatch, MESSAGE - The request signature we calculated does not match the signature you provided. Check your key and signing method.

and after a certain number of actions the second:

ERROR Error: Type: 'amazon' Object: 'SignatureDoesNotMatch' Value: 'The request signature we calculated does not match the signature you provided. Check your key and signing method.'

The "Access Code" quality is taken: "Access Key ID"
and as: "Password" is taken: "Secret Access Key"
from the My Security Credentials > Access keys (access key ID and secret access key) section
, a new key is added there, after adding a password, buckets from Amazon were pulled up, but when saving, I get the error "An error occurred while executing the request" and saving does not occur.
at the very beginning of the post, I wrote that it fell out in the logs during the save.
Tell me at least where to dig?