The following command returns an old error (likely system incompatibility?); mne-python is up to date. The plotting of the AverageTFR named "blah" otherwise works on a linux system.

===========
blah is an 'AverageTFR'

Describe the bug

blah.plot() returns

Traceback (most recent call last):

File "", line 1, in
blah.plot()

File "", line 21, in plot

File "C:\Users\vv221713\AppData\Local\Continuum\anaconda3\lib\site-packages\mne\time_frequency\tfr.py", line 1205, in plot
exclude=exclude, verbose=verbose)

File "", line 21, in _plot

File "C:\Users\vv221713\AppData\Local\Continuum\anaconda3\lib\site-packages\mne\time_frequency\tfr.py", line 1227, in _plot
baseline, exclude, copy)

File "C:\Users\vv221713\AppData\Local\Continuum\anaconda3\lib\site-packages\mne\time_frequency\tfr.py", line 2372, in _preproc_tfr_instance
picks = _picks_to_idx(tfr.info, picks, exclude='bads')

File "C:\Users\vv221713\AppData\Local\Continuum\anaconda3\lib\site-packages\mne\io\pick.py", line 986, in _picks_to_idx
orig_picks)

File "C:\Users\vv221713\AppData\Local\Continuum\anaconda3\lib\site-packages\mne\io\pick.py", line 1035, in _picks_str_to_idx
with_ref_meg=with_ref_meg)

File "C:\Users\vv221713\AppData\Local\Continuum\anaconda3\lib\site-packages\mne\io\pick.py", line 922, in _pick_data_channels
**_PICK_TYPES_DATA_DICT)

File "C:\Users\vv221713\AppData\Local\Continuum\anaconda3\lib\site-packages\mne\io\pick.py", line 383, in pick_types
exclude = _check_info_exclude(info, exclude)

File "C:\Users\vv221713\AppData\Local\Continuum\anaconda3\lib\site-packages\mne\io\pick.py", line 295, in _check_info_exclude
info._check_consistency()

File "C:\Users\vv221713\AppData\Local\Continuum\anaconda3\lib\site-packages\mne\io\meas_info.py", line 693, in _check_consistency
% (prepend_error, repr(self['meas_date']),))

RuntimeError: info["meas_date"] must be a datetime object in UTC or None, got "'(1559814887, 215756)'"

System info

I am using spyder 3.7

mne sys_info

Platform: Windows-10-10.0.17763-SP0
Python: 3.7.4 (default, Aug 9 2019, 18:34:13) [MSC v.1915 64 bit (AMD64)]
Executable: c:\users\vv221713\appdata\local\continuum\anaconda3\python.exe
CPU: Intel64 Family 6 Model 142 Stepping 10, GenuineIntel: 8 cores
Memory: 15.9 GB

mne: 0.20.5
numpy: 1.16.5 {blas=mkl_rt, lapack=mkl_rt}
scipy: 1.3.1
matplotlib: 3.1.1 {backend=Qt5Agg}

sklearn: 0.21.3
numba: 0.45.1
nibabel: Not found
cupy: Not found
pandas: 0.25.1
dipy: Not found
mayavi: Not found
pyvista: Not found
vtk: Not found

Steps to reproduce

〈Replace this text with a code snippet or minimal working example MWE to
replicate your problem, using one of the built-in datasets, preferably the
one called sample. If you can't replicate on a built-in dataset, provide also
a link to a small, anonymized portion of your data that does yield the error.〉

Expected results

〈Replace this text with a clear and concise description of what you expected to
happen.〉

Actual results

〈Replace this text with the actual output, traceback, screenshot, or other
description of the results.〉

Additional information

〈Replace this text with the output of mne.sys_info().〉