Custom themes are broken

Here's a method to figure out errors.

1. Install a code editor like VS Code. Yeah, this is a pain if you don't have it yet, but this is what Microsoft is giving us to work with! VS Code is free and useful though.
2. Go to the GitHub site where Microsoft is posting the schema file:
   Report Theme JSON Schema at powerbi-desktop-samples (github.com)
3. Find the most current reportThemeSchema file and click the link to open it in the viewer page. 
   
4. Then click the Raw button to open the file itself.
   
5. Right click the file and choose Save as to download this file. Store it in the same folder as your theme.
   
6. Open your theme in VS Code
7. Add this line to the top of your theme after the "name" line, with the version matching the downloaded file:
   "$schema": "reportThemeSchema-2.114.json",
   
8. The PROBLEMS pane will show the theme errors:
   
   Don't be overwhelmed if your theme has lots of problems. In one of our most complete themes, we had over 100 errors. Until now, there was no easy way to validate a theme, and often the same set of code is copied over and over again. Our 100 errors were probably the same 4 mistakes repeated throughout the theme.
9. Click on an error and it will take you to the line in the theme that needs to be fixed. Some errors are relativelty easy to figure out. Here, the 0 should not be in quotes:
   
   Some are a littler harder to correct. In this case, the code has all kinds of properties that aren't valid:
   

   You can open the schema file and trace through the properties to figure out what is valid code, in this case: "background": { "solid": { "color": "#DDDDDD" } }, 
   This isn't always easy to figure out. If you are struggling with this part, copy out the lines of code in yellow and open a new issue here and someone can help fix that code. Or better yet, paste in the whole theme. Always open a new question unless you are asking for clarification on the exact same issue as another problem. When you ask questions on a problem that is already marked resolved like this one, often no one looks at them and you are less likely to get a reply.