App Bug Fixing for "Cancelled" Error

I have an existing app with an issue — when trying to publish a post, it shows the message “Cancelled”. I believe the problem might be related to the database.
I’m looking for an experienced full-stack developer to identify and fix the issue, and ensure the system runs smoothly.

Tech Stack:
Backend:

Frappe Framework

Python

Node.js

Frontend:

Flutter

Cloud Services:

Microsoft Azure (deployment, database management, and cloud services)

Responsibilities:

Investigate and fix the issue that causes the “Cancelled” message when posting.

Review and debug the connection between backend and frontend.

Ensure stable performance and functionality.

Provide a brief report on the root cause and preventive recommendations.

Preferred Qualifications:

Prior experience with Frappe Framework and Flutter.

Strong debugging and problem-solving skills.

Good communication and timely response.

To Apply:
Please include:

A short summary of your experience.

Examples of similar projects you’ve worked on.

Your estimated time and cost to fix the issue.