Blank page on fresh install

I have made a fresh install of ISPConfig for multiserver environment. For now, ISP is installed only on web server. When I log in to the panel, I see only the logo and Logout button (that doesn't work).
OS is Ubuntu Server 20.04.2

In apache error log:

Code:

[Tue Mar 02 23:48:25.140630 2021] [fcgid:warn] [pid 2167] [client 192.168.0.102:64094] mod_fcgid: stderr: PHP Fatal error:  Uncaught TypeError: count(): Argument #1 ($var) must be of type Countable|array, bool given in /usr/local/ispconfig/interface/lib/classes/tpl.inc.php(1366) : eval()'d code:116
[Tue Mar 02 23:48:25.140696 2021] [fcgid:warn] [pid 2167] [client 192.168.0.102:64094] mod_fcgid: stderr: Stack trace:
[Tue Mar 02 23:48:25.140707 2021] [fcgid:warn] [pid 2167] [client 192.168.0.102:64094] mod_fcgid: stderr: #0 /usr/local/ispconfig/interface/lib/classes/tpl.inc.php(1366): eval()
[Tue Mar 02 23:48:25.140716 2021] [fcgid:warn] [pid 2167] [client 192.168.0.102:64094] mod_fcgid: stderr: #1 /usr/local/ispconfig/interface/lib/classes/tpl.inc.php(769): tpl->_parse()
[Tue Mar 02 23:48:25.140726 2021] [fcgid:warn] [pid 2167] [client 192.168.0.102:64094] mod_fcgid: stderr: #2 /usr/local/ispconfig/interface/web/index.php(117): tpl->pparse()
[Tue Mar 02 23:48:25.140736 2021] [fcgid:warn] [pid 2167] [client 192.168.0.102:64094] mod_fcgid: stderr: #3 {main}
[Tue Mar 02 23:48:25.140745 2021] [fcgid:warn] [pid 2167] [client 192.168.0.102:64094] mod_fcgid: stderr:   thrown in /usr/local/ispconfig/interface/lib/classes/tpl.inc.php(1366) : eval()'d code on line 116

Any help appreciated.

 

Yeah, for some reason, when I've looked at php.ini, "Loaded Configuration File" was set fpr php7.4, but both "Configuration File (php.ini) Path" and "Scan this dir for additional .ini files" were set for php8.

Removed php8 from system and now it's ok.