Hello everybody,
I just joined also to thank @Hate138 for his tip, i can confirm that his method is working "the solution is to use a VPN. I used protonvpn" i'm now on a 3 days row playing RDO on my windows 10 PC without problems.
Thank you !
L.E. "I have NOT tried any other method to resolve Error 0x20010006, i just created an acount on protonvpn, downloaded the free windows app, connected and then started RDO"