Did you manage to get this working? I just went to the url in the screenshot and see that the site seems to be loading fine.

I haven't seen the exact issue your mentioning unfortunately though, but possibly the cache needs to be cleared? The clear cache option is on the site wide settings -> debug section in 5.4.0.5. A direct link to that page is index.php/dashboard/settings/set_developer/. Let me know if that loads, and hopefully you can get things cleared up quickly.

No go here. Front end looks good (I can edit, create if I navigate to it ok) however back end (Dashboard) nothing appears, just a blank screen (no Sitemap, etc).

I tried the url you gave me but it also came up as a blank dashboard.

If you can steer me in the right direction I would be very thankful.

I suggest you remove the /concrete folder and upload a new one.
then add /tools/upgrade?force=1 or /index.php/tools/upgrade?force=1 behind your domain name (in the browser you use, not in the site.php) to run an "upgrade".

if you upload the same /concrete as the version you are running it still "upgrades" to that version.

It said the Upgrade was successful after trying "/index.php/tools/upgrade?force=1" and the dashboard still shows no items.

Here's a couple more ideas:

- Try and access /index.php/dashboard instead of /dashboard

- Check to see if PHP and SQL errors are silenced on the server. The "blank white page" might actually be some kind of error, but the server may not have debugging enabled, and is displaying white instead of telling you what's really going on

That didn't work either. I have ended up recreating the whole site.

Now I'm faced with my users to access their pages to edit but when they move to another page they are kicked off and need to log back in to edit a second page. ARRG.

If I had hair left I'd be pulling it out now.

I finally figured it out. It was a theme of mine that was causing the issue of not showing the dashboard items.

Crazy, thanks for everyone's help.