1.
python 2.7 – unknown error: call function result missing …
stackoverflow.com/questions/49162667/unknown-error-call-function-result-missing-value-for-selenium-send-keys-even
2. 
How to fix : unknown error: call function result missing …
www.ishandevshukl.com/2018/03/chromedriverexe-update-how-to-fix.html
3.
“unknown error: call function result missing ‘value …
github.com/webdriverio/webdriverio/issues/2631
4.
unknown error call function result missing value for …
www.edureka.co/community/95790/unknown-function-result-missing-selenium-chromedriver-upgrade
5.
unknown error: call function result missing 报错解决方案 – 简书
www.jianshu.com/p/0e7d9f78948f
6.
unable to sendkey in selenium – call function result …
github.com/SeleniumHQ/selenium/issues/5674
7.
python运行的unknown error: call function result missing …
blog.csdn.net/lvxiaoting/article/details/79972431
8. 
[解決]Chromeバージョンアップ後、SeleniumでWebDriverException: unknown …
yusuke.blog/2018/03/07/2179
9.
Selenium使用中的坑——WebDriverException，unknown error: call …
blog.csdn.net/linyuxinqing/article/details/79629587
10. 
Lỗi: “unknown error: call function result missing ‘value …
thichblog.net/kiemthuphanmem/loi-unknown-error-call-function-result-missing-value-khi-chay-chromedriver/
11.
python自动化测试脚本报错unknown error: call function result missing …
blog.csdn.net/qq_40027987/article/details/79544489
Conclusion
Guide above should be useful for Unknown Error: Call Function Result Missing ‘value’.