Error message:
TypeError: Cannot read properties of null (reading 'getChanges') at a (file:///C:/Users/dan/AppData/Local/Wappler/resources/app/Shared/DMXzone/dmxAppCreator/UI/wappler_editor_database_table.js:1:3921) at HTMLButtonElement. (file:///C:/Users/dan/AppData/Local/Wappler/resources/app/Shared/DMXzone/dmxAppCreator/UI/wappler_editor_database_table.js:1:6101) at HTMLButtonElement.dispatch (C:\Users\dan\AppData\Local\Wappler\resources\app\node_modules\jquery\dist\jquery.js:5430:27) at elemData.handle (C:\Users\dan\AppData\Local\Wappler\resources\app\node_modules\jquery\dist\jquery.js:5234:28) at HTMLButtonElement.sentryWrapped (C:\Users\dan\AppData\Local\Wappler\resources\app\node_modules@sentry\browser\cjs\helpers.js:92:17)
Hi Dan, we will need more information than that. Can you provide a screenshot of your insert Server Action (including Post variables) as well as your form code?
Also, when and where do you see this error?
It looks like Wappler is encountering a TypeError because it's trying to access getChanges on a null object. This usually happens when a variable or object isn't properly initialized before being used.
Use Claude Sonnet to help you solve the problem.
These are Wappler editor errors, this needs a bug report to be created, not solved by AI
I encountered similar error messages (TypeError Cannot read properties of null) just yesterday. These were resolved by consulting AI for solutions.
In the absence of AI, it is advisable to ensure that the API includes the correct variables, such as $_GET, $_POST, etc.
This issue is certainly not a Wappler bug.
Whether it's caused by user error or not, if it wasn't a bug a non-cryptic message would be given. The error in question is caused by an internal Wappler editor file, only the Wappler team is able to diagnose the problem - using AI to workaround is just that, a workaround, because the core problem remains a mystery until the user makes a proper bug report using the restart with logging option and following the bug report template and the Wappler team figures out the problem.
And I wonder how AI would help solve this problem, since the error doesn't happen in a web page context, but rather the Wappler editor program itself. Maybe some Server Action is malformed (by a previous AI run) and crippling the Wappler editor, or maybe the user managed to toy a lot with database changes and now it's somehow in an inconsistent state... And such state is tracked internally by Wappler which AI doesn't have access to
Apple, I appreciate your detailed explanation regarding the nature of this error and the importance of submitting a formal bug report when an issue originates from an internal Wappler editor file. Your point about the error message being cryptic rather than informative is valid, and I agree that the Wappler team is best positioned to diagnose the underlying cause.
However, I’d like to clarify my stance on AI-assisted troubleshooting. While AI-driven debugging is indeed a workaround, it has proven effective in pinpointing similar errors in the past. AI tools can analyze patterns in error messages, suggest corrective actions, and help users validate their configurations before escalating the issue as a formal bug report. In this particular case, AI could assist in identifying whether a malformed Server Action or an inconsistent database state is contributing to the error.
That said, I fully acknowledge that AI cannot access Wappler’s internal state tracking, and if the issue persists despite verifying API variables and database integrity, submitting a structured bug report with logging data is the most effective way to ensure a resolution from the Wappler team. My intention was not to dismiss the need for a bug report but rather to highlight an additional avenue for troubleshooting that has been successful in similar cases.
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I guess the big issue is we all accept that Wappler bugs can only be corrected by the team however some of us like to do what we can to pinpoint the bug to assist them.
It's a personal choice
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I think that the issue here is that if the user entered this as a bug report and answered all the required questions it would be much easier for us to pinpoint the issue and not asking him 10 other questions first of how and when the bug occurred.
That is why we have a special bug category with bug reporting template in it.
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