Quote:
'object reference not set to an instance of an object.'
Details about the error you see:
NullReferenceException Class (System) | Microsoft Docs[
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Quote:
A NullReferenceException exception is thrown when you try to access a member on a type whose value is null
Possibly because:
1. You've forgotten to instantiate a reference type
2. You've forgotten to dimension an array before initializing it.
3. You get a null return value from a method, and then call a method on the returned type.
4. You're using an expression (for example, you're chaining a list of methods or properties together) to retrieve a value
5. You're enumerating the elements of an array that contains reference types, and your attempt to process one of the elements throws
6. Exception is thrown by a method that is passed null
Following will help you learn about debugging:
Tutorial: Debug Visual Basic code - Visual Studio | Microsoft Docs[
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First look at the debugger - Visual Studio | Microsoft Docs[
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You have not shared the line/file error is occuring here. When you debug, you will be able to get the exact line where the variable is NULL and error is being raised.
Try out.