That article is a piece of horseshit. It was indeed the renewables (too much of them) that caused the blackout, as independent and regulatory investigations have revealed.
https://en.wikipedia.org/wiki/2025_Iberian_Peninsula_blackou...
https://en.wikipedia.org/wiki/2025_Iberian_Peninsula_blackou...
> Chair of the ENTSO-E Board of Directors, stated: "The problem is not renewable energy, but voltage control, regardless of the type of generation"