Tensorboard does not appear in browser (Google Chrome and/or Internet Explorer)

--- check: autoidentify
INFO: diagnose_tensorboard.py version d515ab103e2b1cfcea2b096187741a0eeb8822ef

--- check: general
INFO: sys.version_info: sys.version_info(major=3, minor=7, micro=6, releaselevel='final', serial=0)
INFO: os.name: posix
INFO: os.uname(): posix.uname_result(sysname='Linux', nodename='aidl03', release='4.4.0-170-generic', version='#199-Ubuntu SMP Thu Nov 14 01:45:04 UTC 2019', machine='x86_64')
INFO: sys.getwindowsversion(): N/A

--- check: package_management
INFO: has conda-meta: True
INFO: $VIRTUAL_ENV: None

--- check: installed_packages
INFO: installed: tensorboard==1.14.0
INFO: installed: tensorflow==1.14.0
INFO: installed: tensorflow-estimator==2.1.0

--- check: tensorboard_python_version
INFO: tensorboard.version.VERSION: '1.14.0'

--- check: tensorflow_python_version
../anaconda3/lib/python3.7/site-packages/tensorflow/python/framework/dtypes.py:516: FutureWarning: Passing (type, 1) or '1type' as a synonym of type is deprecated; in a future version of numpy, it will be understood as (type, (1,)) / '(1,)type'.
  _np_qint8 = np.dtype([("qint8", np.int8, 1)])
.. /anaconda3/lib/python3.7/site-packages/tensorflow/python/framework/dtypes.py:517: FutureWarning: Passing (type, 1) or '1type' as a synonym of type is deprecated; in a future version of numpy, it will be understood as (type, (1,)) / '(1,)type'.
  _np_quint8 = np.dtype([("quint8", np.uint8, 1)])
.. /anaconda3/lib/python3.7/site-packages/tensorflow/python/framework/dtypes.py:518: FutureWarning: Passing (type, 1) or '1type' as a synonym of type is deprecated; in a future version of numpy, it will be understood as (type, (1,)) / '(1,)type'.
  _np_qint16 = np.dtype([("qint16", np.int16, 1)])
.. /anaconda3/lib/python3.7/site-packages/tensorflow/python/framework/dtypes.py:519: FutureWarning: Passing (type, 1) or '1type' as a synonym of type is deprecated; in a future version of numpy, it will be understood as (type, (1,)) / '(1,)type'.
  _np_quint16 = np.dtype([("quint16", np.uint16, 1)])
.. /anaconda3/lib/python3.7/site-packages/tensorflow/python/framework/dtypes.py:520: FutureWarning: Passing (type, 1) or '1type' as a synonym of type is deprecated; in a future version of numpy, it will be understood as (type, (1,)) / '(1,)type'.
  _np_qint32 = np.dtype([("qint32", np.int32, 1)])
.. /anaconda3/lib/python3.7/site-packages/tensorflow/python/framework/dtypes.py:525: FutureWarning: Passing (type, 1) or '1type' as a synonym of type is deprecated; in a future version of numpy, it will be understood as (type, (1,)) / '(1,)type'.
  np_resource = np.dtype([("resource", np.ubyte, 1)])
.. /anaconda3/lib/python3.7/site-packages/tensorboard/compat/tensorflow_stub/dtypes.py:541: FutureWarning: Passing (type, 1) or '1type' as a synonym of type is deprecated; in a future version of numpy, it will be understood as (type, (1,)) / '(1,)type'.
  _np_qint8 = np.dtype([("qint8", np.int8, 1)])
.. /anaconda3/lib/python3.7/site-packages/tensorboard/compat/tensorflow_stub/dtypes.py:542: FutureWarning: Passing (type, 1) or '1type' as a synonym of type is deprecated; in a future version of numpy, it will be understood as (type, (1,)) / '(1,)type'.
  _np_quint8 = np.dtype([("quint8", np.uint8, 1)])
.. /anaconda3/lib/python3.7/site-packages/tensorboard/compat/tensorflow_stub/dtypes.py:543: FutureWarning: Passing (type, 1) or '1type' as a synonym of type is deprecated; in a future version of numpy, it will be understood as (type, (1,)) / '(1,)type'.
  _np_qint16 = np.dtype([("qint16", np.int16, 1)])
.. /anaconda3/lib/python3.7/site-packages/tensorboard/compat/tensorflow_stub/dtypes.py:544: FutureWarning: Passing (type, 1) or '1type' as a synonym of type is deprecated; in a future version of numpy, it will be understood as (type, (1,)) / '(1,)type'.
  _np_quint16 = np.dtype([("quint16", np.uint16, 1)])
.. /anaconda3/lib/python3.7/site-packages/tensorboard/compat/tensorflow_stub/dtypes.py:545: FutureWarning: Passing (type, 1) or '1type' as a synonym of type is deprecated; in a future version of numpy, it will be understood as (type, (1,)) / '(1,)type'.
  _np_qint32 = np.dtype([("qint32", np.int32, 1)])
.. /anaconda3/lib/python3.7/site-packages/tensorboard/compat/tensorflow_stub/dtypes.py:550: FutureWarning: Passing (type, 1) or '1type' as a synonym of type is deprecated; in a future version of numpy, it will be understood as (type, (1,)) / '(1,)type'.
  np_resource = np.dtype([("resource", np.ubyte, 1)])
INFO: tensorflow.__version__: '1.14.0'
INFO: tensorflow.__git_version__: 'unknown'

--- check: tensorboard_binary_path
INFO: which tensorboard: b'.. /anaconda3/bin/tensorboard\n'

--- check: addrinfos
socket.has_ipv6 = True
socket.AF_UNSPEC = <AddressFamily.AF_UNSPEC: 0>
socket.SOCK_STREAM = <SocketKind.SOCK_STREAM: 1>
socket.AI_ADDRCONFIG = <AddressInfo.AI_ADDRCONFIG: 32>
socket.AI_PASSIVE = <AddressInfo.AI_PASSIVE: 1>
Loopback flags: <AddressInfo.AI_ADDRCONFIG: 32>
Loopback infos: [(<AddressFamily.AF_INET6: 10>, <SocketKind.SOCK_STREAM: 1>, 6, '', ('::1', 0, 0, 0)), (<AddressFamily.AF_INET: 2>, <SocketKind.SOCK_STREAM: 1>, 6, '', ('127.0.0.1', 0))]
Wildcard flags: <AddressInfo.AI_PASSIVE: 1>
Wildcard infos: [(<AddressFamily.AF_INET: 2>, <SocketKind.SOCK_STREAM: 1>, 6, '', ('0.0.0.0', 0)), (<AddressFamily.AF_INET6: 10>, <SocketKind.SOCK_STREAM: 1>, 6, '', ('::', 0, 0, 0))]

--- check: readable_fqdn
INFO: socket.getfqdn(): '..'

--- check: stat_tensorboardinfo
INFO: directory: /tmp/.tensorboard-info
INFO: os.stat(...): os.stat_result(st_mode=16895, st_ino=18350110, st_dev=2050, st_nlink=2, st_uid=1000, st_gid=1000, st_size=4096, st_atime=1576748708, st_mtime=1584940178, st_ctime=1584940178)
INFO: mode: 0o40777

--- check: source_trees_without_genfiles
INFO: tensorboard_roots (1): ['.. /anaconda3/lib/python3.7/site-packages']; bad_roots (0): []

--- check: full_pip_freeze
INFO: pip freeze --all:
2to3==1.0
absl-py==0.7.0
anaconda-client==1.7.2
anaconda-navigator==1.9.2
asn1crypto==1.3.0
astor==0.7.1
attrs==19.3.0
backcall==0.1.0
beautifulsoup4==4.8.2
bleach==3.1.0
cachetools==4.0.0
certifi==2019.11.28
cffi==1.14.0
chardet==3.0.4
clyent==1.2.2
conda==4.8.3
conda-build==3.15.1
conda-package-handling==1.6.0
cryptography==2.8
cycler==0.10.0
Cython==0.29.15
decorator==4.4.2
defusedxml==0.6.0
entrypoints==0.3
filelock==3.0.12
gast==0.3.3
glob2==0.7
google==2.0.3
google-auth==1.11.2
google-auth-oauthlib==0.4.1
google-cloud==0.34.0
google-pasta==0.1.8
grpcio==1.27.2
h5py==2.10.0
idna==2.9
importlib-metadata==1.5.0
ipykernel==5.1.4
ipython==7.12.0
ipython-genutils==0.2.0
ipywidgets==7.5.1
jedi==0.16.0
Jinja2==2.11.1
json5==0.9.2
jsonschema==3.2.0
jupyter-client==6.0.0
jupyter-core==4.6.1
jupyterlab==1.2.6
jupyterlab-server==1.0.7
Keras-Applications==1.0.8
Keras-Preprocessing==1.1.0
kiwisolver==1.1.0
Markdown==3.1.1
MarkupSafe==1.1.1
matplotlib==3.1.3
mistune==0.8.4
mkl-fft==1.0.15
mkl-random==1.1.0
mkl-service==2.3.0
mock==2.0.0
navigator-updater==0.2.1
nbconvert==5.6.1
nbformat==5.0.4
notebook==6.0.3
numpy==1.18.1
oauthlib==3.1.0
object-detection==0.1
olefile==0.46
opencv-contrib-python==4.2.0.32
opencv-python==4.1.0.25
opt-einsum==3.2.0
pandas==1.0.1
pandocfilters==1.4.2
parso==0.6.2
pbr==5.1.3
pexpect==4.8.0
pickleshare==0.7.5
Pillow==7.0.0
pip==20.0.2
pkginfo==1.5.0.1
prometheus-client==0.7.1
prompt-toolkit==3.0.3
protobuf==3.11.4
psutil==5.7.0
ptyprocess==0.6.0
pyasn1==0.4.8
pyasn1-modules==0.2.8
pycocotools==2.0.0
pycosat==0.6.3
pycparser==2.20
Pygments==2.6.1
pyOpenSSL==19.1.0
pyparsing==2.4.6
pyrsistent==0.15.7
PySocks==1.7.1
python-dateutil==2.8.1
pytz==2019.3
PyYAML==5.3
pyzmq==18.1.1
QtPy==1.9.0
requests==2.23.0
requests-oauthlib==1.3.0
rsa==4.0
ruamel-yaml==0.15.87
scipy==1.4.1
Send2Trash==1.5.0
setuptools==46.0.0.post20200309
six==1.14.0
slim==0.1
soupsieve==2.0
tensorboard==1.14.0
tensorflow==1.14.0
tensorflow-estimator==2.1.0
tensorflow-hub==0.4.0
termcolor==1.1.0
terminado==0.8.3
testpath==0.4.4
tf-trt-models==0.0
tornado==6.0.4
tqdm==4.43.0
traitlets==4.3.3
urllib3==1.25.8
wcwidth==0.1.8
webencodings==0.5.1
Werkzeug==1.0.0
wheel==0.34.2
widgetsnbextension==3.5.1
wrapt==1.12.1
zipp==2.2.0

I have run the following command to visualize the event of TensorFlow by tensorboard.
tensorboard --logdir /event directory
But got the blank page in the chrome browser. It was the same in internet explorer as well.
My chrome version is 80.0.3987.149 (the latest)
Internet Explorer version is 11.0.9600.19596