If you encounter one of these messages or issues, these are the solutions:

ERROR: NO FINISH BLOCKS FOUND (MIN 1)

Each level requires at least one finish object to be playable. Add it from the functions category with the stamp tool.

ERROR: NO PLAYER BLOCK FOUND (MIN 1)

Each level requires at least one player object to be playable. Add it from the functions category with the stamp tool.

ERROR: MORE THAN ONE PLAYER FOUND (MAX 1)

A level can’t contain more than 1 player object. Delete any extra player models to make the level playable.

The level won’t load when loading it with the “Load” button

The level contains one of the messages above. Try to edit the level using the editor or contact the person who sent you the file.

THIS LEVEL CAN’T BE PUBLISHED YET. CHECK PLAYER AND FINISH BLOCKS

The level is missing a player or a finish block, or it has 2 or more player blocks. ^{Added in 5.0.0}

BEFORE YOU CAN PUBLISH, PLAY THROUGH THE LEVEL TO VERIFY IT

Before the level can be published, it needs to be possible to play through. If the level is eligible to publish, you will see a green arrow under the Tool menu ^{Added in 5.0.0}