I tried to import a csv file with contacts.
I ticked/enabled the checkbox “Resolve fields type from the first line”
However the fields are NOT recognized!
It looks like in the attached snapshot
You can download the simplified csv file from here:
Unzip the archive.
unfortunately, the file can no longer be downloaded, can you copy the first line here into a comment?
My guess is that the file uses invalid column names for the type of data saved in the column or they do not follow the standard names.
That is why you can also manually assign the column types in this step.