这是咋回事呀，难道不支持protobuf了？
protobuf版本是这样的：“google-protobuf”: “^3.3.0”，升到3.4.0也一样报错。
google-protobuf.js:141 Uncaught TypeError: Cannot read property ‘navigator’ of undefined
at Object.goog.labs.userAgent.util.getNavigator_ (google-protobuf.js:141)
at Object.goog.labs.userAgent.util.getNativeUserAgentString_ (google-protobuf.js:141)
at google-protobuf.js:141
at __define (google-protobuf.js:373)
at Object.func (google-protobuf.js:381)
at Object.cc.require (modular.js:64)
at __require (guard_pb.js:1)
at define (guard_pb.js? [sm]:8)
at Object.func (guard_pb.js? [sm]:13320)
at Object.cc.require (modular.js:64)
goog.labs.userAgent.util.getNavigator @ google-protobuf.js:141
goog.labs.userAgent.util.getNativeUserAgentString @ google-protobuf.js:141
(anonymous) @ google-protobuf.js:141
__define @ google-protobuf.js:373
(anonymous) @ google-protobuf.js:381
cc.require @ modular.js:64
__require @ guard_pb.js:1
__define @ guard_pb.js? [sm]:8
(anonymous) @ guard_pb.js? [sm]:13320
cc.require @ modular.js:64
__require @ CardHandler.js:1
__define @ CardHandler.ts:16
(anonymous) @ CardHandler.ts:466
cc.require @ modular.js:64
__require @ PlayerHandler.js:1
__define @ PlayerHandler.ts:12
(anonymous) @ PlayerHandler.ts:339
cc.require @ modular.js:64
__require @ CSClient.js:1
__define @ CSClient.ts:12
(anonymous) @ CSClient.ts:15
cc.require @ modular.js:64
__require @ AppMain.js:1
__define @ AppMain.ts:7
(anonymous) @ AppMain.ts:22
run @ modular.js:85
(anonymous) @ boot.js:327
(anonymous) @ CCGame.js:397
(anonymous) @ CCLoader.js:241
(anonymous) @ utils.js:85
setTimeout (async)
callInNextTick @ utils.js:84
(anonymous) @ CCLoader.js:234
137.proto.allComplete @ loading-items.js:527
137.proto.itemComplete @ loading-items.js:714
137.LoadingItems.itemComplete @ loading-items.js:378
140.proto.flowOut @ pipeline.js:318
flow @ pipeline.js:86
(anonymous) @ pipeline.js:63
(anonymous) @ downloader.js:319
loadHandler @ downloader.js:53