Internal Error

couldn't read file "/navigation.tcl": no such file or directory
    while executing
"source [my request get LOCAL_DIR]/navigation.tcl"
    ("eval" body line 1)
    invoked from within
"eval {*}$args"
    (class "::clay::yggdrasil" method "eval" line 2)
    invoked from within
"my  eval [dict get $data body]"
    (class "::httpd::content.cuneiform" method "content" line 15)
    invoked from within
"my content"