Makie+Pluto: How to display animations in the cell?

My WGLMakie does not work. Can other backends be used to make animations in the cell?

OS: MacOS 11.5.2
julia: 1.6.0
Pluto: 0.16.0
WGLMakie: 0.4.5

In Pluto, Cell 1:

using WGLMakie
using JSServe

Cell 2

Page()

Error info:

Failed to show value:

HTTP.ExceptionRequest.StatusError(503, "GET", "http://127.0.0.1:9284/assetserver/6160a0f5a8831ce6c083fb16b324f82b26630fcd-JSServe.js", HTTP.Messages.Response:

"""

HTTP/1.1 503 Service Unavailable

Connection: close

Proxy-Connection: close

Content-Length: 0

""")

Does anyone have any idea about this issue? I am struggling to make interactive plots, especially online animations in Pluto notebook (animation displayed in the cell) using Makie. Thanks!