pysam.libchtslib.HTSFile has the wrong size

[MeHelmy]

I have installed pysam 0.15.1

when I run pysamstats:

import pysamstats.opt as opt
  File "libchtslib.pxd", line 2590, in init pysamstats.opt
ValueError: pysam.libchtslib.HTSFile has the wrong size, try recompiling. Expected 88, got 80

Knowing that pysam works normally, Is that error related to which version of pysam I have?

Thanks, Medhat