🐛 Netlify CMS - API Error saving changes

Cc: @adamcogan @brydeno @camillars @JackDevAU @pierssinclairssw @UlyssesMaclaren @tiagov8 @tkapa @chrisschultzssw

Hi Team,

Describe the Bug

Some users are getting an error when they try to save some changes on Netlify CMS. This issue could effect all users and should be considered a priority.

To Reproduce

The steps to reproduce are still under investigation. We believe it could be related to forks being outdated.

Expected Behavior

The rule changes should save without errors.

Tasks

• Investigate how to reproduce the issues
• Fix
• Create an issue on the Netlify CMS repo if the issue could occur for other Netfily CMS users

More Information

After a quick investigation with @JackDevAU, we found that the error is thrown when Netlify CMS tries to make this request.
https://api.github.com/repos/SSWConsulting/SSW.Rules.Content/compare/main...JackDevAU:cms/JackDevAU/SSW.Rules.Content/rule/appointments-do-you-show-all-the-necessary-information-in-the-subject/rule

The JackDevAU:cms/JackDevAU/SSW.Rules.Content/rule/appointments-do-you-show-all-the-necessary-information-in-the-subject/rule branch did not exist, which is why the request failed.

After updating @JackDevAU fork, the problem stopped happening - it is not clear why.

To fix the issue, it needs to be investigated why the branch wasn't created.

Could be related to https://github.com/netlify/netlify-cms/issues/2827

Screenshots

Figure: Error when trying to save rules

Thanks!

AB#66440