One of our customer have an issue at the attached image. In this image warning says;

"network license activation failed, contact your network administrator. To enable it standalone, uninstall and reinstall the application."

For this warning, I uninstall it and reinstall 2018 SP2, the warning continued. And I uninstall it again after reinstall 2017 SP2, problem unresolved. Every installation, I cleared unnecessary files and others. Im sure for license activation our customer. And also there is no problem in network. What should I do? Do you have any idea?

Thanks for your interest.