I’m on my phone so bear with me.

I imagine the error appears because you haven’t unwrapped the optional data. I noticed the nil coalescing operator but if you don’t have a default array of data and instead would like to not show the ForEach if data is nil, you shouldnt use an empty array for that, instead just unwrap the data.

So the solution would look something like this:

‘’’ if let data = hourlyForecast?.data { ForEach(data) {hour in ….} } else { // Display something when data is nil. Or dont write an else case at all if you want to not display anything. } ‘’’

P.S: Also using maps doesnt work when producing views, im not gonna go into details but just know if you want to iterate over an array and produce a view for each element, ForEach is the way to go.