Errors can arise when installing the STEAM folder to a hard drive or folder with a name that includes special characters.
The most common problematic characters are: "*", ":", "[" "]", or double spaces (2 successive space characters).
These names can cause a 'preflight' error, or an error that reads: 'You are choosing a new location for your STEAM folder'.
To resolve this, rename the folder/drive so it does not include these characters.
After you rename it, follow the instructions to recreate your STEAM alias here.
For example, rename the above examples to:
If you receive this error when running a Patch Library Updater, move the updater to a folder which does not have this problem and run it from there.