Ionic serve erro

My implementation of ionic serve results in the following way. The time has become very long. The statement without error. The vscode modification code is also not refreshed by chrome. It is still normal before ten minutes.

[INFO] Browser window opened to http://localhost:8100!

[ng] i 「wdm」: wait until bundle finished: /
[ng] Date: 2018-11-01T15:24:02.738Z
[ng] Hash: 8630887d08e8b5693ddd
[ng] Time: 73231ms