I don’t think that static BlueprintImplementableEvents are allowed.
As you’re calling from within the same class, you could just remove the static specifier and call Successfulshare directly (e.g.)
void Aaccessactorios::Callsuccess()
{
Succesfulshare();
}
If you need to call it from other methods, then you’ll need to get access to an instance of Aaccessactorios and call like
void UMyClass::SomeMethod(Aaccessactorios* acc)
{
acc->Successfulshare();
}