Fix and redesign web application in codeigniter

We already have a working application in Code Igniter and we would like to change some design parts, add 1 new module to our application. There are some bugs in the tool which we want to get fixed and optimise our application properly.

All the details of this project are here and I have explained everything it well.
https://we.tl/t-jQDa9rOMjt

Please check requirements pdf document and understand the task before bidding on it.