F# not recognizing members of a record type

Question

I am doing a simple mapping and the compiler doesn't recognize the record's members. The image shows the type OpeningHours itself is clearly ok, with all 3 properties showing:

But hovering over the marked property shows:

error FS0039: The field, constructor or member 'Day' is not defined.

Namespaces are all referenced and I even assign to the very same properties few lines below without any issue.

Answer 1

Based on the constructor and properties, it looks like OpeningHours is defined as a class, not a record. The record syntax can't be used with classes, so the solution is either to change OpeningHours to a record, or to instantiate it using its existing constructor.