Trying deprecated constructor; please alert package maintainer Error in new_CppObject_xp(fields$.module, fields$.pointer, ...)

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Help! trying deprecated constructor; please alert package maintainer Error in new_CppObject_xp(fields$.module, fields$.pointer, ...)

Hi, I have the following stan model and running code but got the error messages. Would anyone please take a look and give some advice? Thank you very much! trying deprecated constructor; please alert package maintainer Error in new_CppObject_xp(fields$.module, fields$.pointer, …) : no valid constructor available for the argument list In addition: Warning message: In if (nchar(CXX) > 0) return(TRUE) : the condition has length > 1 and only the first element will be used failed to create th…

I appreciate if you can advice as well!

Thank you!