@gertjan You were very objective.
Thank you very much,
As I'm starting in PFsense it doesn't cost anything to put this CRON to restart at night.
like I mentioned to you very strange, this happens to some person or other and expected.
It seems that OPENVPN stops listening to that user, then when I restart it through the GUI, the client connects, but like, there are others connected and everything is working normally.
But it's fixed, thanks a lot for your support.