Quicksight Dataset suddenly cant refresh from S3 anymore

I have a Quicksight dataset that’s been working fine for months pulling data from S3 via a manifest file but all of a sudden all the refreshes started failing with the errors below since yesterday:
Error details:
S3 Iterator: S3 problem reading data

I’ve double checked the manifest file format and the S3 bucket permissions for Quicksight and everything seems fine and nothing has changed on our end for this to suddenly stop working out of the blue…

Manifest file:

"fileLocations": [
"URIPrefixes": [
"globalUploadSettings": {
"format": "JSON"

Hmm, if it randomly started failing I would suggest opening up a ticket.

Here are the steps to open a support case. If your company has someone who manages your AWS account, you might not have direct access to AWS Support and will need to raise an internal ticket to your IT team or whomever manages your AWS account. They should be able to open an AWS Support case on your behalf. Hope this helps!

I have access but we don’t pay for AWS Support.