When I go to configure slic3r, does not want to configure it, the panels are shown below (Slicer3r) variable is not of type Wx:: Window at C: Repetier-Host / Slicer3 / lib / std / Slicer3 / line 204
What should I do? while everything is working properly.

This is not something we can help you with. Try looking for a solution on Google … %3A+Window

The most common cause of this problem seems to be special characters in your username or in a path used by slic3r or Repetier.