C++14 standard requested but CXX14 is not defined

[IndrajeetPatil]

My builds are failing with the following error and I am not sure what I can modify in my yml file to get rid of this error-

* installing *source* package 'metaBMA' ...
** package 'metaBMA' successfully unpacked and MD5 sums checked
** using staged installation
** libs
*** arch - i386
Error in .shlib_internal(args) : 
  C++14 standard requested but CXX14 is not defined
* removing 'c:/RLibrary/metaBMA'
Error in i.p(...) : 
  (converted from warning) installation of package 'metaBMA' had non-zero exit status
Calls: <Anonymous> ... with_rprofile_user -> with_envvar -> force -> force -> i.p
Execution halted
Command exited with code 1
7z a failure.zip *.Rcheck\*

Any suggestions?