Can't load Open VDB Sequence from Embergen

Hello,
I always get this message when loading Open VDB smoke and fire sequences from Embergen.

I tried to load free VDB sequences from this link: https://jangafx.com/software/embergen/download/free-vdb-animations/

Single Open VDB file loads fine (non-sequence)

Am I doing something wrong?

/edit: apparently some of the free sample files work fine, I guess there is something wrong with Embergen export with those that don’t work?

Thank you