can no longer add/remove documents for envelopes created through DocuSignApi

For our app, we create envelopes with a document for signing for DocuSign's eSignature app using the DocuSign Api. Everything was fine until Q1/Q2 2024. Now, customers report that they no longer can edit/delete documents as described here https://support.docusign.com/s/document-item?language=en_US&rsc_301&bundleId=gbo1643332197980&topicId=fjx1578456267870.html&_LANG=enus

Envelope is in state created at this point.

When manually uploading a doc, I still can use the feature described above. DocuSign support could not help. Any ideas what might be the problem here?

You need to set ShowEditDocuments = "true" in the DocumentSettings object of the EnvelopeViewSettings that is used to determine the various settings or embedded sending. And yes, this is a new update that was recently launched.

Not sure which lang you're using, I'll assume C#, here is the code you need:

    private static EnvelopeViewRequest PrepareViewRequest(string startingView, string returnUrl)
    {
        EnvelopeViewSettings viewSettings = new EnvelopeViewSettings
        {
            StartingScreen = startingView,
            SendButtonAction = "send",
            ShowBackButton = "false",
            BackButtonAction = "previousPage",
            ShowHeaderActions = "false",
            ShowDiscardAction = "false",
            LockToken = string.Empty,
            RecipientSettings = new EnvelopeViewRecipientSettings
            {
                ShowEditRecipients = "false",
                ShowContactsList = "false",
            },
            DocumentSettings = new EnvelopeViewDocumentSettings
            {
                ShowEditDocuments = "true",
                ShowEditDocumentVisibility = "false",
                ShowEditPages = "false",
            },
            TaggerSettings = new EnvelopeViewTaggerSettings
            {
                PaletteSections = "default",
                PaletteDefault = "custom",
            },
            TemplateSettings = new EnvelopeViewTemplateSettings
            {
                ShowMatchingTemplatesPrompt = "true",
            },
        };

        EnvelopeViewRequest viewRequest = new EnvelopeViewRequest
        {
            ReturnUrl = returnUrl,
            ViewAccess = "envelope",
            Settings = viewSettings,
        };
        return viewRequest;
    }