MissingMethodException: Method not found.

Hi all. I have a problem that the callbacks from the html page cannot find the methods in the Unity application. At the same time, the methods exist, I manually call them in the script itself, and the correct method signature (namespace, class and method name) is indicated in the error. What could be the problem?





The methods themselves, when called from Start, work correctly and write what they need to the log. But as soon as I try to do it through the callback, the above error is written. Below is a screenshot of how my callbacks are arranged.



Where 'method' is 'InvokeOpened', 'InvokeError', 'InvokeUserRewaaard' etc.


My Unity is 2021.3.6f1

 

Tried adding link.xml, didn't work.

 

I got the same trouble with connect of yandex sdk to my webgl game. Did you solve that?

 

Hi! You should check a value that you send via Send Message() in JS. It must correspond with allowed types for this method: string, number or empty (Documentation: https://docs.unity3d.com/Manual/webgl-interactingwithbrowserscripting.html).

And each type should correspond to these types in C# scripts (js => C#):

• string => string
• number => float

Examples:

1. Code (JavaScript):

   1. instance.SendMessage('ObjectName', 'MethodName', 'string')
   =>
   
   Code (CSharp):

   1. ObjectName.MethodName(string value)
2. Code (JavaScript):

   1. instance.SendMessage('ObjectName', 'MethodName', 3)
   =>
   
   Code (CSharp):

   1. ObjectName.MethodName(float value)
3. Code (JavaScript):

   1. instance.SendMessage('ObjectName', 'MethodName', 7.5)
   =>
   
   Code (CSharp):

   1. ObjectName.MethodName(float value)