If you’ve forgotten your master passcode for managing Spaces in Mylio Photos, don’t worry! Resetting it is quick and easy.
Click the Spaces icon in the left sidebar.
Choose Manage Spaces, then at the bottom of the dialog, click Forgot your Passcode? Reset it.
Log in to your Mylio Account, then return to the Mylio Photos application.
Click the Spaces icon in the left sidebar, then choose Manage Spaces. You'll be prompted to create a new Master Passcode.
Learn More: https://manual.mylio.com/topic/manage-spaces