header ‘x-amz-content-sha256’ missing

Hi,

I am in the process of setting up updraftplus for the first time. I am using the S3Generic provider — but I have modified line 12 of s3generic.php to be:

> protected $use_v4 = true;

As my provider and their location only support v4.

While performing a “Test S3 Settings” I receive the following error (in both ‘path-style’ and ‘virtual-host’ based modes):

“Delete failed: UpdraftPlus_S3::deleteObject(): [InvalidRequest] header ‘x-amz-content-sha256’ must be included in signature”

I had a look through updraftplus/includes/S3.php but it is not clear (to me), why this header would not be set when performing a delete.

[Note: I also see this error while trying a complete backup and upload.

UpdraftPlus_S3::initiateMultipartUpload(): [InvalidRequest] header ‘x-amz-content-sha256’ must be included in signature (line: 587, file: /home/redacted/wordpress/wp-content/plugins/updraftplus/includes/S3.php) ]

Debugging information from the host:

Memory limit:
	512M
PHP version:
	7.4.24 - show PHP information (phpinfo)
MySQL version:
	10.1.48-MariaDB-0ubuntu0.18.04.1
Current SQL mode:
	NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION
Curl version:
	7.58.0 / SSL: OpenSSL/1.1.1j / libz: 1.2.11
OpenSSL version:
	OpenSSL 1.1.1 11 Sep 2018
MCrypt:
	No
ZipArchive::addFile:
	Yes
zip executable found:
	Yes: /usr/bin/zip

Thanks.