DumpGpu Open Empty

i use to DumpGpu command, try to open OpenGPUDumpViewer.bat. But Google Chrome show is empty. Google Chrome Console have json parse error GPUDumpViewer.html:13 Uncaught SyntaxError: Unexpected non-whitespace character after JSON at position 345 (line 13 column 2)
at JSON.parse ()
at GPUDumpViewer.html:209:27
at Array.forEach ()
at load_json_dict_sequence (GPUDumpViewer.html:200:8)
at init_page (GPUDumpViewer.html:5759:13)
at onload (GPUDumpViewer.html:6590:158)