ERROR: unknown shorthand flag: 'o' in -ost-header=localhost Questions › Category: Questions › ERROR: unknown shorthand flag: 'o' in -ost-header=localhost 6 Vote Up Vote Down Mark asked 3 weeks ago I have been using host header for a while but recently, it started giving this error – ERROR: unknown shorthand flag: ‘o’ in -ost-header=localhost when I run this command – ngrok http -host-header=localhost 4858 Share this:TweetWhatsAppEmailTelegramMorePrintShare on TumblrPocketLike this:Like Loading... Related