It's a report the Daily Express, which is mostly malicious fiction. The Express is not a high quality newspaper.
Misting condensation in the cabin is pretty common in Asia especially on the ground while passengers are boarding or deplaning (... there's got to be a better word...) when humidity is high and the aircon has to work hard to handle the extra load of open doors. I've even experienced snow (small frozen water particles) from the air conditioning on occasion.