: The vector and bitmap graphics used for costumes and backdrops.
Turn on "File name extensions" in your OS settings to ensure you aren't double-tagging the file.
Troubleshooting: "Convert ZIP to SB3" Fixes for Common Errors
: You can utilize sb3fix by TurboWarp to read and recover corrupted Scratch projects even if the ZIP directory is damaged.
Verify the platform does not store your project files on public servers.
One common error indicates that a "required property 'assetId'" is missing. This typically means that one of your costumes is missing its unique identifier, which breaks the project's ability to locate the asset. The assetId should look like a long string of hexadecimal numbers and be included in the costume's entry within the project.json file.