I believe that in order to be able to send PMs you need to participate more. I do not know how to quantify "more" but I think your problem is that you only have 11 posts.

NOTE: I am not an admin, and if I am wrong an admin can correct me.

It's correct that you need to have a certain amount of posts to send PMs. Previously there have been incidents were spammers/attackers sent PMs to other members with provocative content and this rule was implemented to stop that.

I do think you should be able to reply to a PM if you have received one, I'll ask Qbix if that is possible to implement.

thanks for explanation.
is this unlocked automatically?
Or I need to ask somebody to check my posts scoring and unblock if ok.

I confirm that I can NOT reply to PMs sent to me 😒

I sent you one to see if you still can't reply back, tell me if it worked (it seems to have worked on my side)

Vynix, nope, I can not reply to your PM. I assume there should be reply button or smth to do this.
Thank you for your support.

More or less, the thing is to post messages, it should unlock after a certain amount (I have no idea which..), but remember, always prefer quality over quantity when it comes to messaging.