problem with the detail harvester

I don’t know what’s going on in my scrapebox but since yesterday the “detail harvester” window has stopped appearing and only what I show in the image appears when I click on “detail harvester”.
I don’t know what to do, I’m moving through forums and YT but I can’t find a solution, 
What seems to me is that the window to choose the search engines in “Detailed Harvester” is missing.

So, I hit “detailed harvester” and the screen of the search engines should open, well, that one doesn’t appear and only the pop-up window that notifies me to choose 4 engines maximum appears. It’s like an internal error I think.

I request help please.

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