No widget porposed on app for NS panel, Scenarios created not displayed


I’m running ewelink V5.0.0 on a Android V9 target. I’m was able to connect an pair several NS Panels and one NS Panel Pro. one light, one °C sensor. I encountered no problem during the installation. But as soon I try to create a widget on NS Panel, the page widget stays blank. No choice proposed. I tried by clicking on add button, and also via the 3 dots.

It’s also true for scenario. I created 2 scenarios to control the light using one button of one NS panel. But nothing appear in the list after creation. The scenarios exist because they are working.

Do you know where come from the problem ?