Esteem app; [V.2.1.0] Got an error message when I tried to edit a post

Issue: https://github.com/esteemapp/esteem-mobile/issues/900

Description
When I tried to edit my post, I got an error message

To Reproduce
Steps to reproduce the behavior:

1. Launch the app
2. Click on any of your post
3. Click on the edit icon
4. Edit
5. Click okay and see error

Expected behavior

I expected that I should be able to edit my post successfully.

Screenshots or Video

Smartphone (please complete the following information):

• Device: [Techno spark ]
• OS: [Android 7.0]
• Version [new version 2.1.0]