The most common reason why you cannot withdraw your VIU, is that your Rank is simply nit high enough. To be able to withdraw your VIU, your rank must be Junior Member or higher. If your Rank is still Newbie, then withdrawals will not be enabled. If you try, it will display a red error stating you must increase your rank.
You can check your membership rank, by clicking on your avatar in the top right of the Viuly platform, and in the drop down you will see a series of stars, and the name of your rank. The lowest rank is Newbie, followed by Junior Member.
If there are still issues, please email us directly here: firstname.lastname@example.org
Or, you can manually log a ticket here: https://support.viuly.io