Problems with Images on a site on wordpress multisite

Hi I have installed wordpress multisite on wp.nimt.ac.in which is running perfectly fine however on one of the sites the images don’t render – (on school.wp.nimt.ac.in) When I checked the url of one of those images – it was an older url on which the site was originally created. Now to solve this I guess I have to change some mysql records in phpmyadmin. However since this is running on an ec2 instance on aws cloud – I sshed to phpmyadmin. Earlier it used to run perfectly fine but now I cannot open phpmyadmin. I get a message:

Multisite only works without the port number in the URL.