Description: Blank screen displayed on clicking the Technology tags in the Challenge listings page steps to Reproduce: 1. Go to Challenge listings page. 2. Click a technology tag displayed below a challenge listed. Expected Result: Challenges should be filtered (according the particular technology) and listed. Screenshot: <img width="958" alt="Filter_by_technology tag" src="https://user-images.githubusercontent.com/55895538/93749351-c1e91b80-fc34-11ea-9eef-feb0c52e54ec.png"> Video: [Filter_by_technology.zip](https://github.com/topcoder-platform/community-app/files/5254376/Filter_by_technology.zip)