Jesper: can you hit F12 in your browser, refresh the page (Umbraco backend) and go to Console. Any errors there?

Hi Bo,

No root element found.

It could be related to a known bug for < Umbraco v. 7.1.9 where /config/applications.config is cleared.

Can you check your applications.config and see if it's empty? :-)

applications.config:

    <?xml version="1.0" encoding="utf-8"?>
<applications>
  <add alias="content" name="Content" icon="traycontent" sortOrder="0" />
  <add alias="media" name="Media" icon="traymedia" sortOrder="1" />
  <add alias="settings" name="Settings" icon="traysettings" sortOrder="2" />
  <add alias="developer" name="Developer" icon="traydeveloper" sortOrder="3" />
  <add alias="users" name="Users" icon="trayuser" sortOrder="4" />
  <add alias="member" name="Members" icon="traymember" sortOrder="5" />
  <add alias="forms" name="Forms" icon="icon-umb-contour" sortOrder="6" />
  <add alias="translation" name="Translation" icon="traytranslation" sortOrder="7" />
</applications>

Alright, thanks!

We'll have to dig through the logs, I think. Can you check the latest log file found in /App_Data/Logs and find the No root element found exception?

Perhaps/hopefully it tells us, which XML file is empty :-)

As a follow-up question, is the umbraco.config file (located at /App_Data/umbraco.config) empty?

Hi,

The umbraco.config is not empty.

I get a lot of different exceptions and warnings in the log. Eg.:

  WARN  Umbraco.Core.Services.ApplicationTreeService - The tree definition: <add application="settings" alias="dictionary" title="Dictionary" type="umbraco.loadDictionary, umbraco" iconClosed="icon-folder" iconOpen="icon-folder" sortOrder="6" /> could not be resolved to a .Net object type

And:

[P12976/D2/T141] WARN  Umbraco.Web.UmbracoModule - Status code is 404 yet TrySkipIisCustomErrors is false - IIS will take over.

I will continue to examine the logs...

Hmm, i'd be more interested in errors/exceptions than warnings. Can you try to reload the backoffice and then check the log after? The exception should be at the bottom of the log file then :-)

Hey Jesper,

Did you, by some chance, upgrade the website from a version that was older than version 7.7?

If so, it might be that your user group doesn't have a start node set for media and content.

I'd check that all user groups have start nodes configured even it is the root media node and the root content node (root in this case is "Media" and "Content" respectively and not a node you've created).

Thanks

Nik

I cleared cookies and cache and did a reload:

Only log entries:

 2019-03-05 11:37:30,569 [P95236/D9/T91] INFO  Umbraco.Core.Security.BackOfficeSignInManager - Event Id: 0, state: User: [email protected] logged in from IP address xxx.xxx.xxx.xxx
 2019-03-05 11:37:30,776 [P95236/D9/T33] WARN  Umbraco.Core.Services.ApplicationTreeService - The tree definition: <add application="settings" alias="dictionary" title="Dictionary" type="umbraco.loadDictionary, umbraco" iconClosed="icon-folder" iconOpen="icon-folder" sortOrder="6" /> could not be resolved to a .Net object type

Hmm, a few other things:

• Does the site (frontend) work? Or are you getting any YSODs there? If you get an YSOD, can you paste the stack trace here?
• in App_Data/config there's a handful .config files, can you check each of them to make sure there're not empty?
• In the Content section, right click the "Content" label above the recycle bin and hit "Republish entire site" (don't think that helps any, but it's worth a shot :-))

Another pondering: what happens if you (while logged in to the Umbraco backoffice) enter the URL in the browser: http://yourdomain.com/umbraco/backoffice/UmbracoApi/Content/GetById?id=1059

Would be neat to know which XML file is empty ;-)

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