No it's not the flash plugin. The message is from the library manager GUI and formatted for you to see by the library manager GUI, which means it launched just fine.

I have written about this many times already. As gently as possible, I'm going to remind all of you to use the search engine instead of guessing, or simply don't answer.

The very first response, from hborre, is correct. In re-installing or whatever you have allowed the firewall to activate it's supremacy over Poser and not allow it to answer queries from it's library GUI.

The Library GUI is complaining about the very first message it sends to Poser. In every case this has happened before, it was because the user had re-configured his/her firewall, whether knowingly or not, doesn't matter, that is what happens.

Also, this has nothing to do with Internet access, although your firewall may use phrasing that makes you think it does have something to do with it. I have built router and firewall software for years, and let me tell you that many of the developers who work on those components don't know they're solution space very well and use incorrect terminology in their UIs, so don't be fooled.

Poser communicates locally with the Library GUI (or 3rd party library GUIs) via loopback TCP sockets. Your firewall is blocking all sockets for Poser. Fix it.

---

Renderosity forum reply notifications are wonky. If I read a follow-up in a thread, but I don't myself reply, then notifications no longer happen AT ALL on that thread. So if I seem to be ignoring a question, that's why. (Updated September 23, 2019)