Invalid JSON data when changing start menu icon

[anventia]

I added the following to the bottom of my config JSON:

  "controlStyles[20].target": "Taskbar.ExperienceToggleButton#LaunchListButton[AutomationProperties.AutomationId=StartButton] > Taskbar.TaskListButtonPanel > Border#BackgroundElement",
  "controlStyles[20].styles[0]": "Background:=<ImageBrush Stretch="Uniform" ImageSource="<https://cdn-icons-png.flaticon.com/512/7554/7554093.png>" />",
  "controlStyles[21].target": "Taskbar.ExperienceToggleButton#LaunchListButton[AutomationProperties.AutomationId=StartButton] > Taskbar.TaskListButtonPanel > Microsoft.UI.Xaml.Controls.AnimatedVisualPlayer#Icon",
  "controlStyles[21].styles[0]": "Visibility=Collapsed"

however I get "Invalid JSON data" error when trying to save it in Windhawk.
Does anyone know why?

[anventia]

Yeah, previously, the last one as 19, so I added this to the end as 20 and 21. I also made sure to add the comma to the previous last line that didn't have one, and my new last line doesn't have the comma.

[m417z]

One hint is that GitHub colors parts of the JSON you posted in red. Quotes inside strings must be escaped - each quote must turn into \".

You can also use one of the online JSON validators.

Generally, the JSON wasn't designed to be modified by hand. It was designed to backup and share mod settings. Why not use the settings UI instead?

[anventia]

[edit: not sure what was wrong, but i seem to have fixed it for now]
 
Thanks! It resolved the error, However, now my Start Button icon is completely gone, it didn't seem to replace the image properly.

"controlStyles[20].target": "Taskbar.ExperienceToggleButton#LaunchListButton[AutomationProperties.AutomationId=StartButton] > Taskbar.TaskListButtonPanel > Border#BackgroundElement",
    "controlStyles[20].styles[0]": "Background:=<ImageBrush Stretch=\"Uniform\" ImageSource=\"https://cdn-icons-png.flaticon.com/512/7554/7554093.png>\" />",
    "controlStyles[21].target": "Taskbar.ExperienceToggleButton#LaunchListButton[AutomationProperties.AutomationId=StartButton] > Taskbar.TaskListButtonPanel > Microsoft.UI.Xaml.Controls.AnimatedVisualPlayer#Icon",
    "controlStyles[21].styles[0]": "Visibility=Collapsed"

I followed the instructions here, and also tried the image links shown as examples in case it was a problem with the image I was using, but for some reason it doesn't show up.