U4-7476 - 7.3.2 backoffice Postsave 400 bad request

I've tried this on two 7.3.x sites:

• Set Mandatory to true on a property of type textstring
• Go to a document of this type
• Don't fill in the mandatory field
• An error shows in the interface, no errors in the js console
• Went to a document which had the property filled out and cleared it
• Upon save an error shows in the interface, no errors in the js console

I think you probably have some old ClientDependency cache laying around. Go into ClientDependency.config and change the version (just make it one higher or lower). If that doesn't help, make sure to thoroughly delete your browser cache.

hi Sebastiaan - thanks for taking a look. I had tried those things before posting this ticket. I can't replicate this on my dev machine either, only on our test environment. The difference being that our test environment is in release mode meaning that CD assets are being bundled. Maybe there's some sort of minify issue with client dependency? thanks

i just added a screenshot from the browser console

our issue, sorry Sebastiaan. we had some custom error config swallowing the umbraco 400 response :|

I've just had this issue with latest version of Umbraco - seems the cause was the same as Andrew's - we had <httpErrors errorMode="Custom" existingResponse="Replace"> int the web.config file.

Seems it's the existingResponse="Replace" part that causes Umbraco to return a server error when performing validation of properties.

Thought I'd leave that here for anyone else who might get the same issue.

We added the following to Web.config to get around this error:

<location path="umbraco">
    <system.webServer>
      <httpErrors existingResponse="PassThrough" />
    </system.webServer>
  </location>