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Do you have any concrete extractors? If not, build one to continue.

That should trigger what you need to get the research.

And yes, that's completely silly. The game assumes you have that, when between techs and wonders there's a good chance you may not. And yeah the S.H.E.P.I.D. notification in your event log tells you nothing of how to actually proceed. Your scientists shouldn't even know you need the tech yet when that shows up, and it doesn't work as a hint either since there's no indication of why the storyline is not progressing.
 
Do you have any concrete extractors? If not, build one to continue.

That should trigger what you need to get the research.

And yes, that's completely silly. The game assumes you have that, when between techs and wonders there's a good chance you may not. And yeah the S.H.E.P.I.D. notification in your event log tells you nothing of how to actually proceed. Your scientists shouldn't even know you need the tech yet when that shows up, and it doesn't work as a hint either since there's no indication of why the storyline is not progressing.
Thank you! Yes, it is really silly situation)