@eddy0620 could you provide us with some more information about your system and knime version? Also a log file in debug mode:
Then: has this job ever run successfully or does it Airways crash. Is it possible to provide a minimal example where this crash happens without spelling any secrets?
Then a new knime version 4.7 with much improved python support is about to be released this week. It could be worth to try that also.
The name "python2“ in three knime path error message has nothing to do with the old Python 2 version. I think it will get renamed. You are right to stick to Python 3 except if you explicitly know that you need a very special old version.