I submitted this as a GitHub issue last week.

TL;DR: Backblaze aparently doesn't support those flags that are enabled by default
"Backblaze does not yet accept these headers, so we recommend downgrading to AWS Javascript 3.x SDK version 3.728.0."

https://github.com/vatesfr/xen-orchestra/issues/8358

cloudrootab created this issue in vatesfr/xen-orchestra

open S3 Backup: "Unsupported header 'x-amz-checksum-mode' received for this API call." #8358

@olivierlambert
I've finally had time to sit down and do some more troubleshooting.
It seems that the issue is somehow tied to the backup-jobs themselves.
Deploying XOA and subsequently importing XO-config from my XOCE instance. I continued to see several issues between both instances.
These issues pretty much went away, when I re-did the backup-jobs from scratch. And are now much more in-line with what I'm excepting to see. This was done on both XOA Stable, Latest and XOCE

I am no longer able to repoduce this at all.
So my guess is that a bug of some sort got introduced with this being a constantly updated from source instance.

Marking as solved. As I don't believe there is much more to do at this time.

@McHenry
Differences could be things such as:

• Amount of cores between hosts for migrations
• Guarantee performance between guests. So that they don't affect each other as much.

Same with overprovisioning dynamic RAM

Clicking through the different parts in the leftmost pane has (what feels like) inconsistent landing pages. When in reality, it lands on the previous tab visited for that item.

Example.
If I click on Xen Orchestra Appliance I would expect to land on the Dashboard tab. But if I had previously looked inside the Pools tab, then that is where I would land.

This behaviour is the same regardless of which item I click through. Be it Pool/Host/Guest..

I'll admit that it kind of makes a little bit of sense in thought. But it feel far more jarring and confusing when navigating. Since you never really know which tab you'll be met with when browsing. As each and every level/item is handled individually, separate from all others.