Redux framework E_ERROR

After installing plugin, it crashes wordpress, later it started working but when you want to change anything theme based it crashes again and this message is listed:

WordPress verzija: 5.9.1
Trenutna tema: Wega (verzija 1.1)
Trenutni dodatak: Template Library and Redux Framework (verzija 4.3.11)
PHP verzija 7.3.25

Detalji greške
===============
Greška tipa E_ERROR se dogodila u liniji 695 fajla /home/zulexbaz/public_html/wp-content/plugins/redux-framework/redux-core/inc/classes/class-redux-filesystem.php. Poruka greške: Uncaught TypeError: Return value of Redux_Filesystem::chmod() must be of the type bool, null returned in /home/zulexbaz/public_html/wp-content/plugins/redux-framework/redux-core/inc/classes/class-redux-filesystem.php:695
Stack trace:
#0 /home/zulexbaz/public_html/wp-content/plugins/redux-framework/redux-core/inc/classes/class-redux-filesystem.php(538): Redux_Filesystem->chmod('/home/zulexbaz/...')
#1 /home/zulexbaz/public_html/wp-content/plugins/redux-framework/redux-core/inc/classes/class-redux-filesystem.php(384): Redux_Filesystem->put_contents('/home/zulexbaz/...', '