So yeah in the mostly probable case that reading was not involved in many of the comments, they were not shut down for a technical issue but the govt stops them from discharging the water.

All the reactor works fine and would work fine. Gov makes choice to let people hurt

Indeed, it's mentioned in the article: "The measure is an environmental protection requirement to avoid discharging too much hot water into rivers already warming from the heatwave."

France (and to a lesser extent large parts of europe) is currently suffering from an exceptional heat wave.

You kinda don’t want to kill the whole river ecosystem. We need a functioning environment

Correct, and they are discharging water because they cheapen out on not building cooling towers. So the issue is actually completely fixable, but it is a question if building cooling towers is cheaper than shutting down reactors for few weeks a year.