I made a new installation now on digital ocean. You also have the same problem, see:
'ioncube_loader_lin_7.3_ts.so' -> '/usr/local/ioncube/ioncube_loader_lin_7.3_ts.so'
'loader-wizard.php' -> '/usr/local/ioncube/loader-wizard.php'
yes: standard output: Broken pipe
yes: write error
[6]+ Stopped tail -f /var/log/php-rebuild.log
[root@srv1 ~]# php -v
PHP 7.3.6 (cli) (built: Jun 10 2019 01:08:31) ( NTS )
Copyright (c) 1997-2018 The PHP Group
Zend Engine v3.3.6, Copyright (c) 1998-2018 Zend Technologies
with the ionCube PHP Loader + ionCube24 v10.3.5, Copyright (c) 2002-2019, by ionCube Ltd.
[root@srv1 ~]#