*urgent - Prestashop Suddenly Blank

[HAIRWEBSHOP]

Hello,

 

After adding a slider image, Prestashop does not show anything on the front office other than the logo and the grey footer image of the default bootstrap theme.

I tried disabling the homepage slider, but that didn't work.

 

When I go to the theme in the back office it will output the following error.

Warning op lijn 2607 in bestand /path/htdocs/www/hwtemp/tools/htmlpurifier/HTMLPurifier.standalone.php
[512] Cannot retrieve value of undefined directive Core.CollectError invoked on line 7474 in file /home/vhosting/b/vhost0072918/domains/hairwebshop.nl/htdocs/www/hwtemp/tools/htmlpurifier/HTMLPurifier.standalone.php

Can someone please help me figure out what's going on?
Thank you in advance!

Edited May 4, 2016 by HAIRWEBSHOP (see edit history)

[HAIRWEBSHOP]

And now it's working again, could it be our webhost?

[ernexus]

Well, possibly yes. They are using HTMLPurifier, which ensures standards-compliant output. Meaning it may change your output and for some reason it could broke.

[HAIRWEBSHOP]

Thank you kindly for your reply ernexus,

 

Are there any precautions I can take to prevent these kinds of problems in the future?

[ernexus]

You could look for your server error logs, it may logged some fatal php errors.