Moving these files back to the default system drive often resolves the "Executable or content player signature is invalid" error that frequently accompanies license issues. 5. Reconnect Your Libraries
This article will dissect what this error means, why it happens, which software it pertains to, and most importantly, how to fix it permanently.
The error "there is no license for this product" is a copy protection response. It indicates that the Opus software you have installed cannot find a valid license file or hardware dongle authorization on your computer.
