DXMC column save as csv format errors with EXCEPTION message

[panchadx]

** Expected Behavior**
./dxmc column save --envname TESTING --rulesetname rs_TESTING_ruleset --inventory --outputfile testing_ruleset.csv

The above command was expected to generate the CSV file. But it errors.

** Actual Behavior**
When the command executed, it errors as below:

[user@host dxmc]$ ./dxmc column save --envname TESTING --rulesetname rs_TESTING_ruleset --inventory --outputfile testing_ruleset.csv
EXCEPTION: KeyError: ''

[126103] Failed to execute script dxmc
[user@host dxmc]$ ./dxmc --version
dxmc, version 0.8.2.1

Steps To Reproduce the Problem
This error comes for any ruleset that has the custom algorithm assigned to it.