Hello,
A) Was it working before IRStudio?
B) What has changed from last time it was running?
C) Have you maybe updated Python version from 2.7 to 3.6?
D) If IRStudio was installed with 2.x and you have updated to 3.x, it will not work
E) Have you maybe updated Python from 3.x to 3.x where now the Python symlink in /usr/bin has been removed or it is now broken.
F) have you check /usr/bin/python if the symlink exists and to where it is pointing?
I cant recall the file name but inside IRStudio directory in SASCONFIG there is a configuration or maybe XML file that has python path and version. check this file and see python path and its version if it exists at OS level.
Regards,
Ahmad