There seems to be some issue with the analysis or the creation of the charts. Got this in the console:
Uncaught Error: Type mismatch. Value function Object() { [native code] }1 does not match type number in column index 1 at gvjs_Mo (jsapi_compiled_default_module.js:119) at gvjs_Uba (jsapi_compiled_default_module.js:139) at gvjs_R.gvjs_.h_ (jsapi_compiled_default_module.js:141) at gvjs_R.gvjs_.eq (jsapi_compiled_default_module.js:142) at gvjs_R.gvjs_.cq (jsapi_compiled_default_module.js:142) at ChartData (main.js:847) at AnalyseConversation (main.js:491) at FileReader.fr.onload (main.js:83)