500 Response when submitting a VAT Return on the sandbox environment

[DavidPosude]

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Describe the bug
A clear and concise description of what the bug is.

When submitting a VAT Return to the sandbox environment the response is 500: internal server error using an organization user

To Reproduce
Steps to reproduce the behavior:

Submit a VAT Return to the sandbox environment

Expected behavior
A clear and concise description of what you expected to happen.

A 201 response with the success info

Screenshots / Requests / Responses
If applicable, add screenshots to help explain your problem.

The below is the request

curl --location 'https://test-api.service.hmrc.gov.uk/organisations/vat/730809834/returns' \
--header 'Content-Type: application/json' \
--header 'Accept: application/vnd.hmrc.1.0+json' \
--header 'Authorization: Bearer VALID_TOKEN' \
--data '{
  "periodKey": "A001",
  "vatDueSales": 105.5,
  "vatDueAcquisitions": -100.45,
  "totalVatDue": 5.05,
  "vatReclaimedCurrPeriod": 105.15,
  "netVatDue": 100.1,
  "totalValueSalesExVAT": 300,
  "totalValuePurchasesExVAT": 300,
  "totalValueGoodsSuppliedExVAT": 3000,
  "totalAcquisitionsExVAT": 3000,
  "finalised": true
}'

And the response received

{
    "code": "INTERNAL_SERVER_ERROR",
    "message": "An internal server error occurred"
}

Additional context
Add any other context about the problem here.

The VRN I'm using is 730809834, I am able to retrieve the obligations fine so I believe the authorization is working,
I've read through the related bugs but nothing suggested has helped #893 #873

[rbs-ben]

We are getting the same issue. Can this be looked at please (particularly given the recent changes made to the supported cipher suites which include the advice "If you can continue to test successfully, you don’t need to take any further action"; currently, we can't test successfully...)

[sx0309]

We are getting the same issue,Please help to see how to solve it