Add Content Slider Fails to Load

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Clean install of 5.7.03 was working fine with Elemental theme. Was adding content, when I noticed that the Add Content block slider was populating very slowly. It now fails to load entirely with the following Chrome console error:

Failed to load resource: the server responded with a status of 500 (Internal Server Error) http://local.wampserver.com/index.php/ccm/system/panels/add?cID=1


Environment is:
Apache Version : 2.4.4
PHP Version : 5.4.12
MySQL Version : 5.6.12

Thoughts on cause and/or resolution?

iLP
 
iLP replied on at Permalink Best Answer Reply
iLP
Perhaps, solved this.

Enabling the "fileinfo" PHP extension appears to have restore the functionality. What is confusing is that it was working fine without the extension for two days.
a575606 replied on at Permalink Reply
I'm getting the same error and I don't know what to do. Happens every time I click on 'Stacks' and it's stopping me from editing my site at all.

[Error] Failed to load resource: the server responded with a status of 500 (Internal Server Error) (add, line 0)

I enabled fileinfo and restarted apache but no dice any other ideas?