When I start Parallels Desktop I get a message:
Clicking on 'Renew License' returns "Network error":
Parallels Desktop Enterprise edition versions 10 and earlier have reached End of Life state and no longer can be activated with the keys that have format A00***-*****-*****-*****-*****.
- Contact your system administrator to get a new license key.
- Upgrade your copy to the latest version of Parallels Desktop Business Edition.
- After the upgrade, activate your copy with the new license key.