Vassal Not Add Extensions in 2.15

Technical Support & Bugs
1

I updated my vassal along with the 4.2 version of Battlestar Galactica. The module loads fine, but for some reason it won’t allow me to add the extensions; every time I do I get an errors message.

2

Thus spake Kaijudo:

I updated my vassal along with the 4.2 version of Battlestar Galactica.
The module loads fine, but for some reason it won’t allow me to add the
extensions; every time I do I get an errors message.

What’s the error message?

–
J.