I’m using [this q2a import](https://gist.github.com/Communiteq (formerly DiscourseHosting)/769eff2014d5482f0ab776de03dc3349) script and see below error. Please help to fix this issue.
Is it problem with my userbase or script. How to fix. Thanks!
Loading existing groups...
Loading existing users...
Loading existing categories...
Loading existing posts...
Loading existing topics...
importing users
80 / 447 ( 17.9%) [208 items/min] Traceback (most recent call last):
12: from script/import_scripts/question2answer.rb:601:in `<main>'
11: from /var/www/discourse/script/import_scripts/base.rb:47:in `perform'
10: from script/import_scripts/question2answer.rb:70:in `execute'
9: from script/import_scripts/question2answer.rb:89:in `import_users'
8: from /var/www/discourse/script/import_scripts/base.rb:877:in `batches'
7: from /var/www/discourse/script/import_scripts/base.rb:877:in `loop'
6: from /var/www/discourse/script/import_scripts/base.rb:878:in `block in batches'
5: from script/import_scripts/question2answer.rb:106:in `block in import_users'
4: from /var/www/discourse/script/import_scripts/base.rb:247:in `create_users'
3: from /var/www/discourse/script/import_scripts/base.rb:247:in `each'
2: from /var/www/discourse/script/import_scripts/base.rb:259:in `block in create_users'
1: from /var/www/discourse/script/import_scripts/base.rb:290:in `create_user'
/var/www/discourse/script/import_scripts/base.rb:393:in `find_existing_user': undefined method `downcase' for nil:NilClass (NoMethodError)
I will just follow your instructions to modify code.