App fails to compile: "Can't find variable: self"

[xeoncross]

I'm having trouble launching this application via a physical android device as well as an emulator instance. The Javascript starts to build but fails with the following error:

I don't see any instance of the variable "self" in this codebase, so I assume I'm missing something in the project setup.

[xeoncross]

I changed the app.json sdkVersion to 28.0.0. (I don't have 29 installed) and the message changed to provide more details.

[basaamp]

You can try expo.snack.io, I build a whole android chatting application on it, it has a camera you take a picture and upload a file.
https://snack.expo.io/@basaampro/chattyiov12a

[eugein]

npm add whatwg-fetch@2.0.4 --save

[riyadshauk]

I fixed build issues in this PR: #29.

[chenyu1990]

npm add whatwg-fetch@2.0.4 --save

not work for me.
sdk 35.0.0