I click one button and I don't see the panel

I click one button and I don’t seethe panel and I cant open the tree of files pls help me anyone

And this button is ???
Try toggle tree-view panel Ctrl+\

Toggle Tool Bar is Alt+Ctrl+T

I can’t see the panel after Tool bar

View > Toggle Toolbar

If it is still hidden it may be docked and hidden to the left.

I mean I can’t see the panel with View and others buttons

Try pressing alt and see if it appears.