DAX error on one machine, not on another

Hi,

I have created a formula in Power BI Desktop, visuals looking fine. When a colleague opens it, the charts look fine, until he enters the formula bar and press enter, he gets a syntax error. The code is exactly the same as the one working on my machine.

We tried the usual, replacing ; with , but no luck. Any idea what might cause this behavior - some region issue, or?

Thanks.

Edit: I had problems uploading the sample screenshot, but I hope the error is explained clearly enough. 

//RSK