The US and the EU have been clashing on a lot of things recently. Today, it's been confirmed Iran is definitely still one of them.
What it means: Ever since 1979, the US has been imposing 'sanctions' on Iran – which basically means banning any kind of business exchange or trade with them. It started with just a few products and sectors, and became more and more comprehensive over the years, with other world powers (including the EU) joining in.
But back in 2015, six world powers struck a deal which said sanctions would be lifted if Iran stopped producing nuclear weapons. Almost immediately, companies from all over the world invested in Iran - French company Total started building a gas field, Norwegian firm Saga Energy launched solar power companies, Airbus started selling planes to IranAir, Siemens began constructing railways... the works.