Hi , just to add one more part , this error came after enabling the developer mode ,
has tried with few old articles , but none of them helped in fixing the issue. BUG: ERROR 503 after installing extensions from command line using composer ( This was the topic which report the same error .
If the magento is switched to the mode developer, you can see page error 503. My solution that helps me is as follows: in root give the following commands:
php bin/magento cache:enable
php bin/magento cache:clean
rm -rf var/cache/*
sudo /opt/bitnami/ctlscript.sh restart varnish
But the above solution is also not working now.
Please provide a Possible solution for the same