1.Error: Could not find the correct Provider<xxxxxxxxx> above thisThe provider is not found in the XXXXXX Widget. The provider is not found in the XXXXXX Widget2.NoSuchMethodError: The method '[]' was called on nullThe. Method returns an array, but does not count as empty. Note that there are other types, not just arrays3.NoSuchMethodError: The method 'markNeedsBuild' was called on null2. The timer is used to refresh the countdown when sending the verification code. The timer is still working when the page is destroyed, which will cause this exception4.FormatException: Unexpected character (at line 18, character 4) This is easier, the type conversion error for exampleMap<String.StringWord-wrap: break-word! Important; "> < p style =" max-width: 100%StringThe parameters of the5.NoSuchMethodError: The getter 'isNotEmpty' was called on nullIsNotEmpty can only determine not to benullObject, such as empty string, empty array, empty dictionary, ifnull, will report an exception6.RangeError (length): Invalid value: Valid value range is empty: 5An array7.NoSuchMethodError: The getter 'item' was called on nullThe.get method gets the parameters asnull, plus empty processing8.Failed assertion: boolean expression must not be nullBool can't be empty, so let's make a callfalse

9.type 'ErrorEntity<xxxxxxxx>' is not a subtype of type 'BaseListEntity<yyyyyyyy>'Model mismatch during data parsing10.ArgumentError Invalid argument(s) : For example, if an array is assigned to the banner, the component does not have time to assign the corresponding index to the target, causing array[null]

11.FileSystemException: Cannot open file, path = '/var/mobile/Containers/Data/Application/273E0A0A-1E50-46B6-AF27-777591893A95/Documents/NIMSDK/1fe7b5329187d66a878fb0dd3 623a2f3/Global/Resources/49ff1c3b38967d0cae814985acd933b5.jpg' (OS Error: No such file or directory, errno = 2The file path is incorrect12.Null check operator used on a nullValue A component to be refreshed by using the provider through notify is destroyed. Before notify, determine whether the component is mounted or loding, Dispose, etc. Mounted will be found in the use of a lot of. https://codingfire.blog.csdn.net/article/details/109864780

13.PlatformException(Webview is null.null.null.null) It's a good idea to check the Webview, but sometimes it's not a mistake14.Bad state: No Element traversal operates on each element (dictionary) parameter, which may benull, to do short processing15.Bad state: Stream has already been listened to. Temporarily assume that Stream is listening on an object repeatedly16.MissingPluginException
MissingPluginException(No implementation found forMethod XXXXXXXXXX on channel XXXXXXXXXXX) channel calling native method is not implemented17.NoSuchMethodError
NoSuchMethodError: The method ‘xxxxxxxxx’ was called on null.
Receiver: nullReturns the method called by Tried calling: XXXXXXXXXX ()null

18._TypeError 
type 'Future<dynamic>' is not a subtype of type 'Function'Methods are defined without a Future declaration19.FormatException 
FormatException: Unexpected character (at line 18, character 4)
			"originalPath": "announcement/announce/index.html"^ An exception occurred while converting json, check the data model and data structure20.PlatformException 
PlatformException(Error.Error while launching https:/ / XXXXXXXXXX)Url is not validCopy the code

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