Upgrade to 8.6 Enable Custom Display for Search Page makes the listing page gone

Hi. Just upgraded from 8.3 to 8.6 and I have this bug:
Every time I go to Search Page> Enable Custom Display and ENABLE IT, then I go to my site and want to go from one of the links here to a LISTING PAGE, i got nothing.
I’ve tried to put into this field only [TITLE] to see if anything in my code is the problem:
BUT EVEN WHEN I PUT ONLY THAT THERE, the link is not working. I’ve checked my server error log and it says something about 256 not being enough memory for the script… sure..
Now, the default search is not good for my site and also contains text that I have to translate directly by searching directly into the script (“Posted 17 zile 18 ore 25 minute 18 secunde ago”) and the price tag is not seeing into my 3 columns layout. The code below is just perfect for what I need, it’s just that it cannot be included into the big code of the theme properly (it shows perfectly, but just try and click on any link and wait forever). I mention that I don’t have any button GET SHORTODES FROM DEFAULT in this section, only in the LISTING PAGE layout section. Page is: https://agro-anunt.ro, and now the default code for the SEARCH PAGE is on.

(my code)
<div class=”panel panel-default”>
<div class=”panel-body”>
[IMAGE][STICKER]<span class=’ftext’>[price]</span>[/IMAGE]
<b>[TITLE]</b>
<br />
[DATE]
<br />
<i class=”fa fa-signal”></i> [hits]
<br />
[LOCATION-FLAG] [LOCATION]
<br />
[RATING]
<br />
[EXCERPT]
</div>
</div>
(end)