Null check operator used on a null value

How to resolve the following error message “Null check operator used on a null value” when using a web application made with the front end in flutter and the backend in spring boot which is located in railway and the postgres database in the cloud in the elephantsql site in principle if the web application hosted in RENDER worked, it is ruled out that it is something in the code because it works locally without problem, only in the RENDER hosting there is a problem, please give any suggestions


What you’ve described doesn’t sound like a Render issue. With Spring Boot, you would be using Docker, so you’re even more in control of your environment.

I’m not a Flutter or Spring Boot expert, but a Google for “Null check operator used on a null value” brings up a Stack Overflow post with the same error with regards to Flutter:


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