Attachment endpoint seems to be broken since I upgraded central to v2026.1.1

Support
1

1. What is the issue? Please be detailed.
I've been awarded by colleagues that the photos they collect on the field are no more visible in our tools. Looking into the disk that stores the pictures, it started to get wrong when I updated Central to v2026.1.1
WeI use curl calls on the attachment endpoint

The url below returns an 404 error ( {"message":"Could not find the resource you were looking for.","code":404.1} )

https://mycentral.org/v1/projects/5/forms/Sicen_2022/Submissions/uuid:c9ebb39b-19b4-44c5-8ea7-932a93273024/attachments/1782313436135.jpg

When the dl route for this resource works fine from the browser (so the resource does exist)

https://mycentral.org/dl/projects/5/forms/Sicen_2022/Submissions/uuid:c9ebb39b-19b4-44c5-8ea7-932a93273024/attachments/1782313436135.jpg

Our Central instance :

versions:
6b1ac3b8a8f4b21c74eda22d4773a332a4c724e3 (v2026.1.2-1-g6b1ac3b)
56b6bbdb4cac59aa850e3ddd1cd19ab9f2be1af3 client (v2026.1.2)
142c1c85501d90d225116862ba79dd914c5fcfc1 server (v2026.1.1)

Does anyone have any idea about this issue ?

2

I'm getting the same result on my server, and on a hunch I tried using a lower case for "/submissions/" and it worked as expected. At some point this must have been made case sensitive. The lower case matches the documentation so I recommend migrating to using lowercase everywhere.

3

Thanks a lot Gareth !

4

I was going to say the same thing, this caught us too!

5

Yes, Central v2026.1.0 made API paths case-sensitive. For the API, it's submissions, but for the OData endpoint, it's Submissions.