uniapp app白屏问题

进行多次进入退出app操作后出现以下错误后白屏 另打包后第一次进入也是白屏

reportJSException >>>> exception function:callReportCrash, exception:weex core process crash and restart exception  
09:12:35.857 reportJSException >>>> exception function:createInstanceContext, exception:white screen cause create instanceContext failed,check js stack ->ReferenceError: Can't find variable: WeexPlus  
09:12:35.878 getTemplateInfo== template md5 326cee34da6155a16aac5300d6f16e17 length 9126959 base64 md5 MmzuNNphVaFqrFMA1vFuFw== response header {"templateSourceBase64MD5":["MmzuNNphVaFqrFMA1vFuFw=="],"templateSourceMD5":["326cee34da6155a16aac5300d6f16e17"]}