Drupal 7.34 / Ubercart 3.8 - Please select at least one node type on YML export settings page!

[denvpc]

System:
Drupal 7.34 / Ubercart 3.8
YML export tools settings:

Result:
Please select at least one node type on YML export settings page!

[validoll]

I have a similar configuration works well.

What php version?
Are you press to save button?

What output dpm(variable_get('yml_tools_types')); (need setup devel module) ?