Fix small issue on flutter

I have an issue with my project built with flutter, which needs immediate resolution. The problem lies in the application's functionality - it is not functioning as intended and needs to be fixed. Fortunately, I have identified the source of the issue, so this should help reduce the scope of the project. Time is of the essence here, so I'm looking for a skilled freelancer who can quickly diagnose and resolve the issue. It would be immensely appreciated if the freelancer can provide a detailed description of the steps taken to locate and fix the problem. Thank you for taking the time to look at this listing - your expertise is much appreciated!