An error when running imitation_learning demo

[bihanbihan]

(rlxintong) hgdx@hgdx-System:~/RLBench/examples$ python imitation_learning.py
Traceback (most recent call last):
File "imitation_learning.py", line 40, in
demos = np.array(demos).flatten()
ValueError: setting an array element with a sequence. The requested array has an inhomogeneous shape after 1 dimensions. The detected shape was (2,) + inhomogeneous part.
QObject::~QObject: Timers cannot be stopped from another thread
QMutex: destroying locked mutex

[jmcoholich]

I have the same issue.