ApplyTemplateRendererError: Error applying template "toc.html" generated from "toc.yml"

[bbsparkrock]

Describe the bug
When I run docfx docfx.json --serve, I receive the following error:

Error applying template "toc.html" generated from "toc.yml". You have reached the maximum recursion limit of 256.

To Reproduce
Steps to reproduce the behavior:

1. Run docfx docfx.json --serve

Expected behavior
No error to appear and my site to be available via localhost.

Context (please complete the following information):

• OS: Windows
• Docfx version: 2.74.1

Additional info:
toc.yml example:

• name: sparkrock.com
  href: https://sparkrock.com/

I don't receive this error in version 2.73

[KolRah]

Hi same for me with non "modern" templates
version 2.74.1 as well

if I use the default template it's fine
if I use any of the external templates in templates/xxx directory I get this

xxx\api\toc.yml: error ApplyTemplateRendererError: Error applying template "toc.html" to view model "xxx\AppData\Local\Temp\2\docfx\viewmodel\api\toc.html.raw.json" generated from "api/toc.yml". You have reached the maximum recursion limit of 256.
at object Render(BlockToken block, Context context)
at void Write(StringRender renderer, SectionToken obj, Context context)
at void Write(RendererBase renderer, MustacheToken obj, TContext context)
at void Write(T obj, TContext context)
at object Render(BlockToken block, Context context)
at void Write(StringRender renderer, PartialToken obj, Context context)
at void Write(RendererBase renderer, MustacheToken obj, TContext context)
at void Write(T obj, TContext context)
at object Render(BlockToken block, Context context)
at void Write(StringRender renderer, InvertedSectionToken obj, Context context)

Thanks

[filzrev]

if I use the default template it's fine
if I use any of the external templates in templates/xxx directory I get this
xxx\api\toc.yml: error ApplyTemplateRendererError: Error applying template "toc.html" to view model
"xxx\AppData\Local\Temp\2\docfx\viewmodel\api\toc.html.raw.json" generated from "api/toc.yml". You have reached the maximum recursion limit of 256.

It might be related to #9483 changes.

If external docfx template contains toc.html.tmpl file.
It need to rename to toc.html.primary.tmpl.

[KolRah]

Wow wonderful it works
Thanks for your kind help, I had not found the related change
Regards

[yufeih]

Thank you @filzrev ! I updated the release note to include this info.

[rst4]

Actually I experience the same error. I've provided more details in another issue.