Upgrade librenms php 7.1 to 7.2 fail on debian 9.1

I have a new problem, make an upgrade version in php from 7.1 to 7.2, and now the application does not start, it gives 500 error, check the apache and I do not see any errors, I had the phpmyadmin installed and it works perfect.
./validate = OK
./daily = OK


Component Version
LibreNMS 1.48.1-95-g15aee1538
DB Schema 2019_02_10_220000_add_dates_to_fdb (132)
PHP 7.2.15-1+0~20190209065123.16+stretch~1.gbp3ad8c0
MySQL 10.1.37-MariaDB-0+deb9u1
RRDTool 1.6.0

[OK] Composer Version: 1.8.4
[OK] Dependencies up-to-date.
[OK] Database connection successful
[OK] Database schema correct


Check the webserver logs.

Maybe something is wrong in the virtualhost or something

After the upgrade I am left with that error, the virtual host is fine, it has the default configuration, other web applications that I have work, only the librenms are broken.
VirtualHost *:80>

<VirtualHost *:80>
DocumentRoot /opt/librenms/html/
ServerName librenms.example.com

AllowEncodedSlashes NoDecode
<Directory “/opt/librenms/html/”>
Require all granted
AllowOverride All
Options FollowSymLinks MultiViews

what about the webserver logs? when you get a 500 error, your error_log usually tell you what is happening. Maybe a memory exhaust or something.

Hi, i resolv with deleted version 7.1

apt purge php7.1*