Hi, does anyone knows how to fix this?

Could not load C:\Program Files\Pixar\RenderManForHoudini-23.0/18.0/lib/rfh_batch.dll
Could not load C:\Program Files\Pixar\RenderManForHoudini-23.0/18.0/lib/rfh_batch.dll
Could not load C:\Program Files\Pixar\RenderManForHoudini-23.0/18.0/lib/rfh_batch.dll
Could not load C:\Program Files\Pixar\RenderManForHoudini-23.0/18.0/lib/rfh_batch.dll

I had a similar problem and by reinstalling everything from scratch fixed the problem :/

You mean reinstalling houdini and renderman?

Just for anyone that will encounter similar issues.

1. Make sure RenderMan for Houdini is Python 3 version.
2. Use installation via packages (json file). RenderMan has provided a json file at: "C:\Program Files\Pixar\RenderManForHoudini-25.2\packages\renderman_for_houdini.json"
3. Copy-paste this file to: "C:\Users\Dmitriy\Documents\houdini19.5\packages" (houdini<your_version_of_houdini>).
4. Delete everything related to Renderman from houdini.env as json file will do the same and if both are used together, it may cause conflicts. Related post: https://www.sidefx.com/forum/topic/71405/?page=1#post-302661 [www.sidefx.com]

Find "Package installation": https://rmanwiki.pixar.com/display/RFH25/Installation+of+RenderMan+for+Houdini [rmanwiki.pixar.com]

For Houdini 19.0 and beyond, RenderMan for Houdini can be installed with a packages file, found in the RfH installation directory.