You could try to increase the timeout setting in the KNIME.ini. This is mentioned in the log file.
-Dknime.python.connecttimeout=30000
2019-10-08 13:10:51,154 : ERROR : KNIME-Worker-1060 : Node : Python Source : 0:284:380:334:394:310 : Execute failed: The connection attempt timed out. Please consider increasing the socket timeout using the VM option ‘-Dknime.python.connecttimeout=’.
Also make sure that the communication between KNIME and Python is not blocked by a firewall and that your hosts configuration is correct.