Mac OS: Type 3 or Type 10 error may occur if Internet Config is missing

When opening an application, a Type 3 or a Type 10 error occurs if the Internet Config Extension has been removed from the Extensions folder. You may also see an alert with this message: "[Application] cannot be launched because an unexpected error occurred."
This can happen with Mac OS 8.1 through 9.0.4

The solution is to install URL Access 2.3 or later, or make sure that the Internet Config Extension is installed in the Extensions folder inside the System Folder. Note: The Internet Config Extension does not appear in the Extensions Manager control panel. Check inside the Extensions folder itself for the presence or absence of the Internet Config Extension.
Published Date: Feb 20, 2012