Resolving "Failed to Resolve Project Template: Failed to Decompress Error"

Symptoms:

• Error message: "Failed to resolve project template: failed to decompress error" when attempting to open or create a project in Unity.

Cause:

• Corrupted or incomplete download of the project template file.
• Insufficient disk space or low memory on your system.
• Problem with the Unity Editor installation.
• Corrupted or outdated version of .NET framework.
• Long project path exceeding the operating system's character limit.
• Project path containing special or non-Latin characters.

Resolution:

• Clear the cache of the Unity Editor
  • Windows/Linux: Go to Edit > Preferences in the top menu.
  • macOS: Unity > Preferences... or Unity > Settings...
• Re-download the project template file from the Unity Asset Store or the source you obtained it from.
• Ensure that you have enough disk space and memory on your system to decompress the project template file.
• Update or reinstall the .NET framework if it is outdated or corrupted.
• If the issue persists, try restarting the Unity Editor.
• Check if the project path exceeds the character limit or contains special/non-Latin characters, and if so, create the project in a different path. 

Additional Resources:

• Unity Discussions: Failed to resolve project template: failed to decompress
• Unity Issue Tracker: Decompression failure with long project path
• Unity Issue Tracker: Crash with long project path and HDRP installed

If these resources do not resolve your issue, visit the Unity Discussions.

For non-technical matters such as Organizations, Licenses, ID accounts, or other inquiries, please reach out to Unity Support for further assistance.