I has not not use Houdini for a several day.
And when I start Houdini it make me reinstall Non-Commercial License.

But I can't reinstall it .
It keep showing this message that I attach with this post.
What is it mean? I can't understand any of that error code.

I search the forum and see some old post about restart Houdiniserver in Service of Control Panel.

Ps.I use it on Windows10 and only one PC on my network.

Have you purchased a license yet?
If you have, just talk to support, support@sidefx.com.

If you don't have a license yet, then you don't need the license server. Just uninstall what you have and re-instlal the latest version of Apprentice.