XF 2.1 Fatal Error On Installation

LenKaiser

Active member
I'm getting this Fate Error when I enter into the installation of Xenforo 2.12.

Code:
Deprecated: Array and string offset access syntax with curly braces is deprecated in /xxx/dev/src/vendor/dokuwiki/utf8/utf8.php on line 66

Deprecated: Array and string offset access syntax with curly braces is deprecated in /xxx/dev/src/vendor/dokuwiki/utf8/utf8.php on line 67

Deprecated: Array and string offset access syntax with curly braces is deprecated in /xxx/dev/src/vendor/dokuwiki/utf8/utf8.php on line 669

An exception occurred: [ErrorException] [E_WARNING] Cannot modify header information - headers already sent by (output started at xxx/dev/src/vendor/dokuwiki/utf8/utf8.php:66) in src/XF/Http/Response.php on line 386

    XF::handlePhpError()
    header() in src/XF/Http/Response.php at line 386
    XF\Http\Response->sendHeaders() in src/XF/Http/Response.php at line 283
    XF\Http\Response->send() in src/XF.php at line 440
    XF::runApp() in install/index.php at line 14

Xenforo 2.12
PHP 7.4
Apache 2.4.57
MySQL: 10.5.22-MariaDB-cll-lve


TIA for any help!
 
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