Developing 'Playground Page' caused all apps to crash

Application ID: 28040C55-E94C-85B9-FFDB-69EC51D1AC00

Cannot read property 'blockDragSurface_' of null
TypeError: Cannot read property 'blockDragSurface_' of null
    at module.exports.Blockly.BlockSvg.getRelativeToSurfaceXY (
    at module.exports.Blockly.BlockSvg.renderMoveConnections_ (
    at module.exports.Blockly.BlockSvg.render (
    at module.exports.Blockly.BlockSvg.render (
    at module.exports.Blockly.BlockSvg.render (
    at Object.dispose_ (
    at Object.module.exports.Blockly.WidgetDiv.hide (
    at Object.module.exports.Blockly.hideChaff (
    at module.exports.Blockly.Scrollbar.cleanUp_ (
    at module.exports.Blockly.Scrollbar.dispose (

Problem description

Describe what you did in console that led to the error. Please provide a description of what actually happens. Be descriptive: “it doesn’t work” does not describe what the behavior actually is. This will help us with reproducing the problem.

Steps to reproduce

Please describe steps to reproduce starting from the first action.

  1. Video Part 1: ~13:00 ; Created new log function. Went back to the handler and removed what was in OnClickEvent and then it crashed.
  2. One of the last things before clicking back to handler was to delete the raw text next before /n
  3. Unsure as to why, but now all applications are returning the same error

Hi @Alex_Kagel,

Welcome to our community!

I was trying to reproduce the described issue and catch no error.
I don’t quite understand at which moment you receive this error message?
Could you please also specify which video you are talking about?