Hi RojBlues,
Thank you for posting your query in Microsoft Community Forums.
I'm glad to
assist you with your issue.
As what I've understood on your issue, you're having some problems importing a CSV file on People
page because you're receiving an error message of 'The file you chose is not a CSV file. Please choose a different file.' or 'There is a problem importing the file, pleae try again'.
You've mentioned that this issue happens on a different browser, kindly reproduce this issue on
other computer if it will persist also to isolate the issue.
I created a private message wherein you will provide the CSV file that you're trying to import for us to
investigate your issue. Please click on "You have a private reply to this message" link just above your post to view the message. Don't forget to sign in to Microsoft Community Forum to view the link.
We're looking forward to your response