743 to 75 upgrade blank login screen

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Craig100 1136 posts 2523 karma points c-trib

Aug 19, 2016 @ 15:52

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7.4.3 to 7.5 upgrade blank login screen

Just completed a NuGet upgrade of a 7.4.3 site to 7.5. On startup for the first time I just get the login screen with no username and password fields. All I see is the Umbraco logo and "Happy funky friday" on a black screen.

Using W10 Chrome Version 52.0.2743.116 m (64-bit), removed all cookies and have done several Empty Cache and Hard Reloads but to no avail. I can see the username and password fields HTML in the source, but they aren't accessible to a user so can't log in and get to work.

Anyone else getting this?

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Craig100 1136 posts 2523 karma points c-trib

Aug 19, 2016 @ 16:33

0

In source, the "login" div had a style attribute of "display:none". Setting this in Chrome's dev tools to "inline" allowed the login form to show and upgrade progressed normally. Once the upgrade completed, the login screen seems to display normally.

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Marco 13 posts 109 karma points

Aug 31, 2016 @ 21:16

0

I have the same issue, but just on my production environment.

The only thing I found out is that if you set compilation debug="true"> in the web.config, the form works again. I don't know why, maybe something with compression if Umbraco uses that. Looks like a lot of .js files aren't loaded any more.

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Jean-Francois Dessureault 7 posts 30 karma points c-trib

Sep 09, 2016 @ 19:42
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I had a similar issue after upgrading to 7.5.3. In my case, the login screen was plain blank tough.

After some research, I found out that a section was automatically added at the end of the Web.config:
```
<location path="umbraco">  
  <system.webServer>  
    <urlCompression doStaticCompression="false" doDynamicCompression="false" dynamicCompressionBeforeCache="false" />
  </system.webServer>  
</location> 
```
Turns out that the backoffice login shows up normally if you remove that part, even with <compilation debug="false">. So it was indeed related to url compression, as Marco pointed out.

Does this help with your issue?
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Jean-Francois Dessureault 7 posts 30 karma points c-trib

Sep 12, 2016 @ 14:00

1

Maybe that solution wasn't the best idea after all. Even if it seemed to work at first, I then got other errors when Umbraco tries to resolve stuff in /umbracoapi/*.

However, I did solve my issue by clearing the client depencies located in App_Data/ClientDependency/ and App_Data/TEMP/ClientDependency/. With those files gone, the backoffice now behaves normally.

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7.4.3 to 7.5 upgrade blank login screen