Manit Oke thx, I upgrade and change the php version.
I have after that the next error:
Warning: is_file(): open_basedir restriction in effect. File(/templates/system/css/system.css) is not within the allowed path(s): (/home/heimaat/:/tmp/:/var/tmp/:/opt/alt/php71/usr/share/pear/:/dev/urandom:/usr/local/php74/lib/:/usr/local/php71/lib/:/usr/local/php73/lib/:/usr/local/php74/lib/:/usr/local/lib/php/) in /home/heimaat/domains/heimaat.com/public_html/libraries/src/Filesystem/File.php on line 649
when I change the php version to 7.1 the error is gone , so I did because the site is live on-line. So I get the error with the 7.4 version