Composer only downloaded a single .json file


"Updating dependencies
Your requirements could not be resolved to an installable set of packages.

Problem 1
- amzn/amazon-pay-sdk-php 3.2.0 requires ext-curl * -> the requested PHP extension curl is missing from your system.
- oxid-esales/oxideshop-metapackage-ce v6.0.3 requires amzn/amazon-pay-sdk-php 3.2.0 -> satisfiable by amzn/amazon-pay-sdk-php[3.2.0].
- Installation request for oxid-esales/oxideshop-metapackage-ce v6.0.3 -> satisfiable by oxid-esales/oxideshop-metapackage-ce[v6.0.3].

To enable extensions, verify that they are enabled in your .ini files:
- /etc/php/7.2/cli/php.ini
- /etc/php/7.2/cli/conf.d/10-opcache.ini
- /etc/php/7.2/cli/conf.d/10-pdo.ini
- /etc/php/7.2/cli/conf.d/20-calendar.ini
- /etc/php/7.2/cli/conf.d/20-ctype.ini
- /etc/php/7.2/cli/conf.d/20-exif.ini
- /etc/php/7.2/cli/conf.d/20-fileinfo.ini
- /etc/php/7.2/cli/conf.d/20-ftp.ini
- /etc/php/7.2/cli/conf.d/20-gettext.ini
- /etc/php/7.2/cli/conf.d/20-iconv.ini
- /etc/php/7.2/cli/conf.d/20-json.ini
- /etc/php/7.2/cli/conf.d/20-mbstring.ini
- /etc/php/7.2/cli/conf.d/20-phar.ini
- /etc/php/7.2/cli/conf.d/20-posix.ini
- /etc/php/7.2/cli/conf.d/20-readline.ini
- /etc/php/7.2/cli/conf.d/20-shmop.ini
- /etc/php/7.2/cli/conf.d/20-sockets.ini
- /etc/php/7.2/cli/conf.d/20-sysvmsg.ini
- /etc/php/7.2/cli/conf.d/20-sysvsem.ini
- /etc/php/7.2/cli/conf.d/20-sysvshm.ini
- /etc/php/7.2/cli/conf.d/20-tokenizer.ini
You can also run php --ini inside terminal to see which files are used by PHP in CLI mode.
Running update with --no-dev does not mean require-dev is ignored, it just means the packages will not be installed. If dev requirements are blocking the update you have to resolve those problems."

Tried adding some RAM and a few more threads and now this is what i get


Here you go: