Invalid Product Information Module signature. The Module signature is invalid. Module signature may contain letters, digits, underscores (_), or periods (.). However, every identifier must begin with either a letter or an underscore.

The product information module signature for this installer solution is invalid. Each product information module signature must begin with either a letter or an underscore. Module signatures may contain letters, digits, underscore symbols, and periods. Enter a new value for the product information module signature.