I am new on fiverr and I sent buyer request to customer which was accepted(20 dollars). In the requirements, he just wanted me to add two columns in WooCommerce “Order” page in admin panel to store tracking number and tracking company provider. I made a separate plugin for this because he was not providing FTP access for the job. He said to me that it is not a good practice for one plugin to rely on other plugin and he said you have to create a full premium plugin for WooCommerce Shipment tracking. I said it is a premium plugin i will take 50$ for that, he replied he will give me 10$. As I am a new seller on fiverr. I wanted a long term relationship so i said i will make it. I made a premium wordpress plugin that meets each and every demand.
THE REAL PROBLEM STARTS FROM HERE
**Sceen recording he sent to me
Screen recording i sent to him.
The plugin is working fine on my laptop and my friends laptop, . But he sent me a video that whenever he performs operation through my plugin He see a page “The Link is not working HTTP error 502”. And then i sent him the video performing same operation but i didn’t saw any error page. The plugin is working perfectly. I told him to clear cache and cookies but still he faces the same issue. He has strictly said to me that dont deliver the project on order page until i approve it inbox. This issue is not resolved from 10 days. What should i do now?