Hi, Rida -
I believe that many of the entries in TED don't have information pages defined; in this case, you'll see a message about an unreachable page on the Information tab. It looks like this is what's happening in the example you showed in your screenshot.
I should also say that much of the information in TED is fairly old at this point, so you might want to seek alternative sources. For information on power generation technologies, for instance, you could look at the US National Renewable Energy Laboratory's Annual Technology Baseline (https://atb.nrel.gov/) and the Danish Energy Agency's Technology Data Catalogue (https://ens.dk/en/our-services/projections-and-models/technology-data).
Thanks,
Jason