discourse/discourse · error

discourse.upload.uppy-add-files-error

discourse.upload.uppy-add-files-error

Error message

error adding files to uppy: ${err}

What it means

Error "error adding files to uppy: ${err}" thrown in discourse/discourse.

Source

Thrown at frontend/discourse/app/lib/uppy/uppy-upload.js:515

      await updateCsrfToken();
    }

    files = Array.isArray(files) ? files : [files];

    try {
      this.uppyWrapper.uppyInstance.addFiles(
        files.map((file) => {
          return {
            source: this.config.id,
            name: file.name,
            type: file.type,
            data: file,
            meta: { pasted: opts.pasted },
          };
        })
      );
    } catch (err) {
      warn(`error adding files to uppy: ${err}`, {
        id: "discourse.upload.uppy-add-files-error",
      });
    }
  }

  #completeExternalUpload(file) {
    return ajax(`${this.config.uploadRootPath}/complete-external-upload`, {
      type: "POST",
      data: deepMerge(
        { unique_identifier: file.meta.uniqueUploadIdentifier },
        this.#resolvedAdditionalParams
      ),
    });
  }

  get #resolvedAdditionalParams() {
    if (typeof this.config.additionalParams === "function") {
      return this.config.additionalParams();

View on GitHub (pinned to 1b2d7253e8)

When it happens

Trigger: Thrown at frontend/discourse/app/lib/uppy/uppy-upload.js:515 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of discourse/discourse@1b2d7253e8 (2026-08-26). Data as JSON: /api/errors/cb4eb105785748b5. Report an issue: GitHub.