HI

May be password format issue. Basically things to check are whether your passwords are being held in plain text in the database or whether they're hashed, then check whether your web.config file contains passwordFormat="Hashed" in the membership settings. If the passwords in the database are hashed then you'll need to include passwordFormat="Hashed" in your membership settings, if not, passwordFormat="Hashed" can be removed from your web.config.

I know it's been dealt with before here but I can't find any specific posts.

Hope this helps...

Grazitti

Try accessing it in a different browser.. I have a vague recollection of a cache issue that does this.

Do you have the 301 URL tracker package installed?

I had something similar once where it went a bit crazy and tried to add a redirect for */umbraco https://our.umbraco.org/forum/umbraco-7/using-umbraco-7/50407-Login-failed-for-user-in-Umbraco-7

I just trunced the table and it worked again...

Lots of issues in the console

Hmm then I'm running out of ideas.

Does the front end still work? Is it running from SQL Server / CE? Can you log into the DB?

Check the following:

• All files are there (do a comparison with a vanilla Umbraco download if you don't have a local copy).
• Check permissions
• https://our.umbraco.org/forum/umbraco-7/using-umbraco-7/56327-Angular-error-on-login-screen?

well, all the permissions have been double checked and they are all fine.

So I'm back to square one, trying to find out what is causing the issue.

Any other suggestions?

I've had a look in the log files and got this:

2015-11-03 10:47:08,109 [6] ERROR Umbraco.Core.UmbracoApplicationBase - [P9144/T1/D2] An unhandled exception occurred
System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.Count[TSource](IEnumerable`1 source)
   at ASP._Page_Views_Partials_umbLatestBlogWidget_cshtml.Execute() in e:\virtualservers\sdndcjzl\www.mydomain.me\wwwroot\Views\Partials\umbLatestBlogWidget.cshtml:line 33

Line 33 is

 if (userLanguages.Count() > 0)

within a foreach

 @foreach (var post in blogArchive.Children.OrderByDescending(b => b.GetPropertyValue("publishedDate")).Take(3))
            {

                var userLanguages = Request.UserLanguages;
                CultureInfo ci;
                if (userLanguages.Count() > 0)
                {
                    try
                    {
                        ci = new CultureInfo(userLanguages[0]);
                    }
                    catch (CultureNotFoundException)
                    {
                        ci = CultureInfo.InvariantCulture;
                    }
                }
                else
                {
                    ci = CultureInfo.InvariantCulture;
                }

Still unable to get in to the admin panel.

Can anyone suggest what might have gone wrong with this partial view? I can provide a link to the site if it helps.

Is that the last error in the log just after you try to log in? It looks more front end to me.

Have you checked the files in Umbraco and the dlls are there?

I'd check back further in the log - I think you might have a red herring there but .... Test it - back up that partial and replace it with a blank empty partial. See if you can get past that error it?!

I take it you have Articulate installed based on that partial name?

Hmm .. actually I've found a forum post with someone who's backend went screwy..

https://our.umbraco.org/projects/starter-kits/articulate/discussions/57696-Adding-multiple-Articulate-root-nodes-crashes-my-site

Back up then try Shannon's advice (second from bottom post).

UPDATE: I've now replaced the bin folder, the javascript lib folder and incremented the client dependency version and I'm still locked out from the site with a white screen for the admin login.

What would happen if I downloaded a fresh version of Umbraco and went through the upgrade procedure, would that fix any missing file issues that might be causing the site not to work?

Would I lose any data? Obviously I'll take a backup of the current database but just wanted to check.

Owain - have you tried downloading the site and a copy of the SQL DB first. See if it runs locally - then you can rule out missing files and focus on an environmental issue?

Other than that - your suggestion should just start the upgrade process (be sure to merge your config settings though - especially your SQL db conn string).

Well, just to keep anyone else up to date with this, I've now got the local copy throwing a more detailed error message.

Invalid object name 'cmsContentType'.

No idea what that means but I'll keep on digging :)

More and more it sounds like the issue with your live site are the DB connection details.

Check your web.config - around line 52 you'll see something like this:

<add name="umbracoDbDSN" connectionString="server=STEVE-SQL\SQLEXPRESS;database=UmbracoV7_3;user id=sa;password=YOURPASSWORD" providerName="System.Data.SqlClient" />

The above issue was with IE and cookies. After clearing them on my local environment I can now log in to the backoffice on my localhost but after restoring the DB and files to the live server I'm still locked out of my site.

Raised another ticket with the support team at my hosting company to find out what might be causing this.

I took a complete backup, restored it on my local environment, got it all up and running and then put it back on the live server and still I can't access the backoffice.

Getting close to just deleting the site and uploading it all again from scratch.

Deleted the App_Data/Temp folder and now getting

"Umbraco cannot start. A connection string is configured but the Umbraco cannot connect to the database." Error.

At least it's an error now!

Just a note. I had a similar blank white screen for my backend. My culprit was that I had enabled trace in my web.config. I removed it and it works fine.

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