Dio Http request flutter API request | News app

I get "type 'double' is not a subtype of type'int?'" error. dont know what to do, can anyone help me pls?

Please help me this error
The body might complete normally, causing 'null' to be returned, but the return type, 'FutureOr<List<Article>>', is a potentially non-nullable type. (Documentation) Try adding either a return or a throw statement at the end.

what is your theme name ?

Can I run it on web?

I!m takin an error in the NewsApi class while I was addng try/cash.
The Error:
The body might complete normally, causing 'null' to be returned, but the return type is a potentially non-nullable type.
Try adding either a return or a throw statement at the end.
What should I do?
Please help me!!!

why you delete all Map <String, dynamic>toJson() ??

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