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What are the reasons for the error messages "Your upload failed because of a filename error" and "There was a problem creating a new asset manager folder" in Webflow when uploading pictures into a predesigned template or creating a folder for uploads?

TL;DR
  • Rename files and folders using only letters, numbers, hyphens, or underscores, avoiding special characters and long names.
  • Ensure file extensions are supported, files are not corrupted, and refresh or re-login to Webflow if sync issues occur.

These error messages in Webflow usually occur due to file naming or asset manager limitations. Here's a breakdown of the common causes and how to fix them.

1. "Your Upload Failed Because of a Filename Error"

  • Invalid Characters in Filename: Your image file name might include unsupported characters like *, ?, %, #, or backslashes. Use only letters, numbers, underscores (_), and hyphens (-) in filenames.
  • File Extension Issues: The extension might be missing or unsupported. Ensure it ends in .jpg, .jpeg, .png, .gif, or .webp.
  • Too Long File Names: Webflow may reject files with especially long names. Keep filenames under 100 characters.
  • Corrupt File: The image file may be damaged or improperly formatted, even if it has a valid extension. Try resaving it in an image editor before uploading.

2. "There was a problem creating a new asset manager folder"

  • Special Characters or Spaces in Folder Name: Only use alphanumeric characters, dashes, or underscores in folder names.
  • Folder Name Collision: A folder with the same name already exists or is not fully deleted yet. Try using a unique or slightly altered name.
  • Temporary Webflow Sync Issues: Webflow’s asset manager might lose sync during uploads or changes. Try refreshing the Designer or logging out and back in.
  • Permission Glitches: If your project is part of a Team or Workspace, ensure you have permission to manage assets.

3. General Tips for Uploading Assets

  • Drag-and-Drop Caution: Dragging images directly from some sources (like email attachments or certain apps) may not give them valid filenames. Download the image first, rename it properly, then upload.
  • Refresh After Deleting Folders: After deleting an Asset Folder, wait a moment or refresh the page before creating a new one with the same name.

Summary

Webflow may show errors due to unsupported characters, invalid file extensions, name collisions, or file corruption in either filenames or folder names. Use clean, alphanumeric names and supported file types to avoid issues and refresh Webflow if problems persist.

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