Troubleshoot Setup - mymagic/open_hub GitHub Wiki
Upgrade Composer 1.x to 2.0
The older version of OpenHub used composer 1.x for its dependency on Wikimedia. You may want to update to composer 2.0 as wikimedia start to support it. Here's how you can do it:
Edit /protected/composer.json
to update wikimedia version "wikimedia/composer-merge-plugin": "^2.0",
In CLI
cd /var/www/protected
sudo composer update
sudo composer self-update --2
You may get runtime error 'SHA384 is not supported by your openssl extension, could not verify the phar file integrity'
sudo rm -f /usr/local/bin/composer
sudo curl -s https://getcomposer.org/installer | php
sudo mv composer.phar /usr/local/bin/composer
Now, do composer update
again and should be working fine