Hello, in Configuration I do not get anything, I can not add instruments etc …
It’s only in one score, the other scores if I get it Configuration

You’ve closed the panels. Cmd/Ctrl+0 should reopen all the ones that were open before you last typed that specific shortcut, or Ctrl+7 for the left one, Ctrl+8 for the bottom one and Ctrl+9 for the right one.

Thanks !!!