3D-e-Chem Nodes in KNIME for Linux

In KNIME 3.6.0 for linux (Linux Mint 19 64-bit Xfce, based on Ubuntu 18.04 64-bit), after installing the 3D-e-Chem nodes, I get warnings in the console:

1:26:9 Selected directory ‘/tmp/knime_tc_b3vo54jya1wd’ cannot be accessed!
WARN Create File Name 1:27:9 Selected directory ‘/tmp/knime_tc_lp6wiiklplaw’ cannot be accessed!
WARN Create File Name 1:28:9 Selected directory ‘/tmp/knime_tc_f1sfo1jxwhgi’ cannot be accessed!
WARN Create File Name 1:29:9 Selected directory ‘/tmp/knime_tc_gxeax8fygbge’ cannot be accessed!
WARN Qed Calculator 1:30 Could not find templates folder templates/ in plugin org.knime.knip.knimepython
WARN Create File Name 1:31:9 Selected directory ‘/tmp/knime_tc_uqdzckgsyuxn’ cannot be accessed!
WARN Create File Name 1:32:9 Selected directory ‘/tmp/knime_tc_cnvpshoxpxo8’ cannot be accessed!

=====
How can I remedy this problem? Can it safely be ignored?

Thank you.

Hi rjrich,

linking this post to the previous one

Best,
Daria