Variables Blocks Disappeared

[helicoptur]

Welcome to the forums!
I think I know the problem, this happened to me too in the past:

Using an apostrophe in a custom block bricks the project

When you try to make a custom block with an apostrophe and at least one preset input (example: [image]), the palette section of that category will turn black and be impossible to interact with. Through some testing I found out, when you save and reload, the category is still gone, and there's no way of getting it back. [image]

Sometimes the category disappears when you use an apostrophe in a custom block. This is due to the fact that Snap! uses apostrophes internally to compile blocks and it messes up the rendering.
The only solution I know of is to export the XML, remove the apostrophe, and import it back to Snap!.