Error in multibin analysis due to outdated spey entry points

[LMagnoDR]

Greetings,

Running multibin analyses with the full set is yielding spey backend location errors. It seems Spey v0.26 removed the failsafe that was previously mapping deprecated "default_pdf" to current "default" entry points, making some get_backend calls in tools/python/spey_wrapper.py fail to find the appropriate backend. Replacing the instances of "default_pdf" by "default" in the spey_wrapper.py file seems to have fixed the issue for me.

Thank you for the attention.