reference_url failure in sphinx version > 5

After sphinx released version 5, reference_url in sphinx_gallery_conf section gives the following error upon doc build:

Extension error (sphinx_gallery.docs_resolv):
Handler <function embed_code_links at 0x7fe9e0a40820> for event 'build-finished' threw an exception (exception: Expecting property name enclosed in double quotes: line 1 column 2 (char 1))

As far as I could address, for reference_url http://example.com/stable/"in conf.py, /"at the end is treated as escape and removed. If the url is specified as http://example.com, then the following error occurs:

embedding documentation hyperlinks...
WARNING: The following HTTPError has occurred fetching http://example.com/stable_static/documentation_options.js: 404 (Not Found)

The second case can be avoided in https://github.com/sphinx-gallery/sphinx-gallery/blob/e7d7439f6b85c603801945dd9ab510217cd9a269/sphinx_gallery/docs_resolv.py#L153 .

[ntessore]

Just checking in to report that v0.11.0 still has problems with None entries in reference_url.

[bouthilx]

I am having the same issue with 'reference_url': {'sphinx_gallery': None}. Downgrading sphinx to v4.5.0 solves the issue for sphinx-gallery<=0.11.0.