InstallShield 2018 R2 (perpetual license) license revalidation problem

[dzegebart]

Everything was fine with our InstallShield 2018 R2 installation on my machine, until yesterday when it requested to re-validate the license. I got the message "The specified quantity exceeds the maximum allowed quantity (0)". We have InstallShield 2018 R2 Professional Perpetual License

TSConfig.exe /return /no_internet doesn't work; server rejects the request with some kind of XML request error message.

How to fix it?

UPDATE: problem solved after contacting support@revenera.com

[SunilDamoder]

Hi Dmitry,

Thank you for contacting Revenera Support.

Hope we have addressed all your queries and assisted you in reactivating your InstallShield product.

We request you not to share any product or confidential details in forum and instead you can share us the details to our support email at: support@revenera.com

Regards,
Sunil.
Revenera Support.