I solved my issue. HOWTO:
First i installed php7.3 in addition to 7.4
Then I removed from disabled functions: putenv, popen, exec, as they stopped the installation.
In Terminal:
apt-get install libzip-dev
pecl install zip
Then:
find /* -name zip.so
/www/server/php/73/lib/php/extensions/no-debug-non-zts-20180731/zip.so
Then:
Open configuration file for PHP7.3 in AAPanel or open php.ini
Add:
extension=/www/server/php/73/lib/php/extensions/no-debug-non-zts-20180731/zip.so
on the bottom of the file
then restart php.
Then remember to re-add to disabled functions: putenv, popen, exec