Adding/moving custom buttons crashes Charcoal Grey skin - HTML5 output
I've upgraded a 2015 project. The skin and many features were highly customized in the past. Custom buttons was one of those features.
In RH2022, I see that I can now add custom buttons using the interface (YAY!!!) However, the generated output breaks -- every time. When I say breaks, it does not display the skin at all. See screenshot below.

The problem is very repeatable:
1. add button. (at minimum: icon, title, URL to topic)
2. move new button. (or don't, it really doesn't matter)
3. generate.
4. no skin.
5. delete new button.
6. regen -- all is well, but no new button.
I need to add 5 custom buttons for my client's use case. Originally, I added all the buttons and associated info. It all looks great in the preview screen,

but not when generated.
In the settings, I see that with the standard buttons like Print, there is an "OnClick" event function. Do I need to add an event? Where/how do I add that code?
I'm happy to send a Loom video, screen shots, or files as requested to help diagnose troubleshoot.
Thanks in advance,
~Shelley
