Is it a system env var or only set for one user? If the latter, do you run drserver as the same user which has the variable set, not as Administrator or some other user?
Other way round: if you delete the variable on the dr node and fire up Max, does it render the scene or do you get a similar crash?
You may place the attached script on the dr node into the scripts/startup directory, start DrServer and have a look at max.log. There should be a line
"* Environment variable 'ADSK_3DSMAX_PYTHON_VERSION':" and the current value to make sure it is correctly set and used.
Which Corona version do you use?
Have you tried the
"usual" fix for repeatedly dr crashes?
Can you show the last lines of max.log indicating the issue that leads to the crash?
Good Luck