impossible to freeze pane again

impossible to freeze pane again

I did undo "freeze pane" to check if I would find a way to freeze a column together with a row.

1/ after that impossible to re-active it, either on a row or a column,on any tab of my spreadsheet.

please help

2/ how do you freeze pane row + column combined together

I posted a private feedback many days ago, with no answer, so i make it public now

thanks

Daniel