failed to add arguments to attributes that accepts objects about cecil HOT 1 CLOSED

If you specify "object" as the parameter type, there still needs to be a trace of the actual object type in the assembly.
So the value there needs to be an instance of CustomAttributeArgument, specifying the actual type (here probably Int32) plus the value.

For future reference: if you want to know what you need to create, just compile something that includes it and look at how Cecil represents them. Then you know exactly what to create.

Note: for builtin types, it's easier(*) to go via TypeSystem; so module.TypeSystem.Object and module.TypeSystem.Int32.

(*) and also safer - otherwise you might accidentally emit a reference to the wrong type; if your code is running in net6.0 and you are working on a net472 assembly, importing a reference to typeof(object) may cause it to add a reference to the System.Runtime or System.Private.CoreLib instead of to mscorlib

from cecil.