[3rd party plugin replacements, destroys HEAD of document] Blank homepage in home page (Joomla featured articles)

I got a blank homepage
(Joomla featured articles)
after upgrading from 3.2.1.6-rc to the v3.2.1.7

I had to restore the site from backup, having no time to check the eventual PHP error messages (online site).

FC upgrading tasks seems to have been completed correctly during upgrade,
but the frontend was empty. Backend was working normally.

you need to explain more ...
actived error reporting to maximum that can display error and after return this message
i update 10 sites with last flexicontent no error ... maybe a 3dparty component

Hello

can you give me access to the website ?

i think i know which module is not loading the class file

but i need to confirm
you can send a PM wth super admin login

Hello

after you have restored backup

i still see blank page in home,

it does not seem to be related to new flexicontent version

it seems like a system plugin is replacing all HTML with blank due to some failed regular expression

Hello

you have a system plugin or other extension code
- that makes replacements in the HTML head

the regular expression depending on the content of the head, will fail

the head or the head and body of the page are truncated (cut)

When the website will break it is random it depends on the contents of the
There is no bug in the new FLEXIcontent version
also the issue of older v3.2.1.5 and SEOsimple was different and not related to this one
(that issue caused a fatal PHP error, in this issue we have bad regexp replacements in html head contents)

I have restored a previous backup having a 3.2.1 FC version, and upgraded FC to the latest build, and it seems to have solved the problem.
I 'm not able to find the interfering plugin, I'll further investigate on a offline copy later
Thank in any case for the help, and sorry for having wasted your time