Error 500 /manager/processors/login.processor.php

[Romkond]

Hi guys,
I transfered my Evolution CMS 1.4.10 website to another droplet. It works but I cannot log in now.
Error: https://i.imgur.com/8j9MGcG.png
Browser console: https://i.imgur.com/2UJ8lna.png

Cache files deleted. /manager/ folder re-uploaded.

Before:
Database server
Server: Localhost via UNIX socket
Server type: MySQL
Server version: 5.7.33-0ubuntu0.16.04.1 - (Ubuntu)
Protocol version: 10
Server charset: cp1252 West European (latin1)

Web server
Apache/2.4.18 (Ubuntu) mod_fcgid/2.3.9 OpenSSL/1.0.2g
Database client version: libmysql - mysqlnd 5.0.12-dev - 20150407 - $Id: ...
PHP extension: mysqli curl mbstring
PHP version: 7.2.25-1+ubuntu16.04.1+deb.sury.org+1

After:
Database server
Server: Localhost via UNIX socket
Server type: MariaDB
Server version: 10.3.31-MariaDB-0ubuntu0.20.04.1 - Ubuntu 20.04
Protocol version: 10
Server charset: UTF-8 Unicode (utf8mb4)

Web server
nginx/1.20.1
Database client version: libmysql - mysqlnd 7.4.24
PHP extension: mysqli curl mbstring
PHP version: 7.4.24 (actually downgraded to 7.2.34)

Can you help with that?

[Romkond]

I just uploaded the "install" folder and upgraded the existing installation.