P20 Survey and Subnational data does not show up - error page

## I'm submitting a ...
Check one of the following options with "x" and add the appropriate label to the issue as well

[ x] Bug report 

[ ] Regression (behaviour that used to work and stopped working in a new release)

**Describe the Issue**
When you go on http://data.devinit.org/global-picture/poverty and click on P20 - subnational level or P20 - survey level, you get a screen saying 'An unexpected error has occurred.'

**To Reproduce**
Replace the content below with the steps to reproduce the behaviour.
1. Go to http://data.devinit.org/global-picture/poverty
2. Click on P20 subnational level or P20 survey level
3. See error

**Expected Behaviour**
The map showing the p20 at subnational or survey level should appear.

**Screenshots/GIF**

**Desktop (please complete the following information):**
- OS: Windows 7
- Browser Chrome
- Version 71

**Smartphone (please complete the following information):**
- Device: [e.g. iPhone6]
- OS: [e.g. iOS8.1]
- Browser [e.g. stock browser, safari]
- Version [e.g. 22]

**Environment/Server:**

- [ ] Production

- [ ] Staging

- [ ] Test

- [ ] Development

**Additional Context**
Add any other context about the problem here.

Requested Delivery Date: 07/02/2019 I am writing a factsheet with this info, it would be great to have it ASAP so I can complete my analysis