Going into creative mode its likely that you won't have the ability to fly to fix this you will have to run

/ability @s mayfly true

Available commands:

WARNING: chat commands don't work in stable so you will have to use the /scriptevent command to use the commands. Use the following format: /scriptevent jm:(command)

!flyhelp: Displays a list of available commands you can use.
!flypos1: Sets the first corner of your flight zone to your current location.
!flypos2: Sets the second corner of your flight zone to your current location. The flight zone will be a rectangle defined by these two corners.
!flyzone (name): Creates a flight zone with the name you specify. The zone will be defined by the positions you set with !flypos1 and !flypos2.
!flydelete (name): Deletes the flight zone with the name you specify.
!flyshowall: Shows all existing flight zones.
!flyinterval (interval): Set the interval in ticks for checking the flight zone. The default interval is 160 ticks.

requirements

education edition toggle

If you need any more help watch this video

Flight Zones

Installation

Downloads

Supported Minecraft versions

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VEX ESSENTIALS | Update V4.4