They didn't get the money from the European Union and therefore it wasn't built.
The opposition to carbon capture thing isn't even in the wikipedia article about the plant, looks like your source isn't the most trustworthy.
That is a very strange inference to make.
Here's an abstract that claims environmental risks for ccs, and lack of political support (which I understand tends to come in the form of funding?) as a result: https://www.sciencedirect.com/science/article/abs/pii/S03062...
This PDF says it was cancelled due to delays in "transposing" (implementing at country level I think?) the necessary regulations to allow funding: https://core.ac.uk/download/pdf/154669777.pdf
The Wikipedia article about the plant references this politico article, which does mention environmentalist opposition to ccs (that's not what they referenced it for, of course): https://www.politico.eu/article/paperthe-eus-failed-ccs-ambi...
"We, the energy industry, came up with a Green Solution but environmental groups stopped it for reasons x, y, z"
Where x, y, z is some plausible, fungible combination of "they care more about the spotted owl/some other endangered species" and "they care more about punishing us than being solution-focused" and "it's more of a modern-day religion" -- whatever the reader needs to be willing to accept the energy industry's story about how they're trying to do better but it's the environmental groups' fault.
What's interesting about this to me is, where seeing the propaganda round the Iraq War was obvious and obviously crafted, this is much sneakier.
But I think you'll see this more and more -- the energy industry is trying to solve our environmental problems, they say, and would be able to lead us to a greener world if not for those irrational, quasi-religious, badly-prioritizing environmental groups.
This site has an extensive archive of such DEIR comments and subsequent lawsuits for hundreds of projects around the state. It's just how labor negotiations are done in California, now. All the letters and motions are the same, all the front groups have the same name except with different cities or counties, and they are all drafted by the same law firm. A typical example is at [1].
https://phonyuniontreehuggers.com/
1: https://phonyuniontreehuggers.com/wp-content/uploads/2016/01...