When trying to install the addon on the machine without the internet (zip file, install from disk). I have this error:
Oh oh! Thanks for the screenshot @Stas_Pologrudov
I see the version you were trying to install was 2026.07.21, but that’s a Maya only version.
Please get our latest Blender addon from the link below 
Then, make sure to also have Ragdoll Core installed, you can get it from here:
Thanks, this one works. Two things, some non-descriptive error on start:
Looking for Ragdoll Core @ ‘/home/postas/ragdolldynamics/core/2026.03.10/lib’
Ragdoll: An unexpected error occurred with {} (error code: {})
The addon starts though, there is a menu etc… the remaining question is about the activation, but for that one we have to wait for your move…
For completeness, this was sorted via email.
It was an issue with a subscription licence requiring an internet connection to activate, it was resolved by connecting temporarily to activate and then disconnecting again. Ragdoll will re-check for licence expiration date every week or so.