This is not relevant to the question you asked.

All I can answer you here is that you cannot include non-existent functions that are not in the extended class.

For example, this code:

function curriculum_init() {}

Use

function init() {} 

instead.

Look at My plugin skeleton plugin

I think you need to learn more about PHP and Elgg or hire someone.

The Curriculum_int() function is working for I am able to register the menu...The java script in not loading

I used to program in Elgg 7-8 years back and am mostly a java developer....

I have not followed what has changed in Php and elgg and am confused a little, and so i am trying to understand it by little trial and error while trying to tweak my old app to the new design... This is how I can register what all has changed by asking questions...And some changes might not register

To hire a developer, I need to know what to ask for and so don't mind my questions....for I am still trying to figure out whether the design that worked in the past is relevant.. So don't mind my childish questions

I figured out a few things about Bootstrap Function or loading external javascript, but don't see the error logs to understand where the mistake is...

HelloWorld Plugin is basic and I understand this...

Do you have a tutorial to load an external javascript file in Bootstrap function...

And how much would a developer charge to convert my old app to the new one...

In addition to the official documentation, you can use the search on this community.

Also read these related Q&As:

https://elgghacks.com/questions/view/3947/require-js

https://elgghacks.com/questions/view/4088/amd-loading-js-issue

https://elgghacks.com/questions/view/5676/how-to-include-three-js-with-orbitcontrols-js-and-objloader-js-into-elgg

https://elgghacks.com/questions/view/5349/javascript-library

Please code example.

No code, no help ¯\_(ツ)_/¯

I was trying the Market Plugin that was there for 4.3 in 5.1...

I think its your code...Are you going to release for version 5.1, Even CkEditor extended has similar issue..

https://github.com/RiverVanRain/market...

Are you going to release for version 5.1

Sure. Coming soon...

https://github.com/Elgg/Elgg/blob/5.x/mod/discussions/views/default/plugins/discussions/settings.php

or

https://learn.elgg.org/en/stable/guides/menus.html