shiny - Using R radiant, issues with MathJax -

i've installed radiant, , have updated r studio , r latests versions. yet i'm still receiving strange "mathjax" error.

 withmathjax()  show traceback   rerun debug  error in normalizepath(directorypath, mustwork = true) :    path[1]="/www/mathjax/": no such file or directory  

any ideas correct this?

more info on error:

error when trying run radiant: see in browser (chrome) error: path[1]="/www/mathjax/": no such file or directory

i see on command line radiant("marketing") listening on http://127.0.0.1:7160 error in normalizepath(directorypath, mustwork = true) : path[1]="/www/mathjax/": no such file or directory error in normalizepath(directorypath, mustwork = true) : path[1]="/www/mathjax/": no such file or directory

info: rstudio version 0.99.465 – © 2009-2015 rstudio, inc.

r.version() $platform [1] "x86_64-apple-darwin13.4.0"

$arch [1] "x86_64"

$os [1] "darwin13.4.0"

$system [1] "x86_64, darwin13.4.0"

$status [1] ""

$major [1] "3"

$minor [1] "2.1"

$year [1] "2015"

$month [1] "06"

$day [1] "18"

$svn rev [1] "68531"

$language [1] "r"

$version.string [1] "r version 3.2.1 (2015-06-18)"

$nickname [1] "world-famous astronaut"

packageversion("radiant") [1] ‘0.1.83’

after reinstalling package , shiny, , reseting everything, errors no longer persisted.