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Error when conda activate psychopy upon installation

Hi,

I’m installing psychopy in my ubuntu 18.04, as instructed by
https://www.psychopy.org/download.html#linux-install .
Installation was successful (I guess), but I got an error when activating psychopy by “conda activate psychopy.”

ImportError: /home/f209/anaconda3/envs/psychopy/bin/…/lib/libgio-2.0.so.0: undefined symbol: g_spawn_async_with_fds

Could I have any suggestions?

I think I solved this problem by using a newer wxPython.
Thank you anyways,