Exception in rendering!

Message: Cannot read property 'href' of undefined

TypeError: Cannot read property 'href' of undefined
    at t.value (/tmp/nacmartin_phpexecjs5c95d29b7cbf75.20507307.js:34:96792)
    at t.value (/tmp/nacmartin_phpexecjs5c95d29b7cbf75.20507307.js:34:97447)
    at /tmp/nacmartin_phpexecjs5c95d29b7cbf75.20507307.js:79:310054
    at y (/tmp/nacmartin_phpexecjs5c95d29b7cbf75.20507307.js:79:310247)
    at e.render (/tmp/nacmartin_phpexecjs5c95d29b7cbf75.20507307.js:79:317861)
    at e.read (/tmp/nacmartin_phpexecjs5c95d29b7cbf75.20507307.js:79:317480)
    at Object.renderToString (/tmp/nacmartin_phpexecjs5c95d29b7cbf75.20507307.js:79:322141)
    at r (/tmp/nacmartin_phpexecjs5c95d29b7cbf75.20507307.js:106:18393)
    at Object.serverRenderReactComponent (/tmp/nacmartin_phpexecjs5c95d29b7cbf75.20507307.js:106:7345)
    at eval (eval at <anonymous> (/tmp/nacmartin_phpexecjs5c95d29b7cbf75.20507307.js:133:8), <anonymous>:9:23)