When I'm using the fetch function in my react native apps, things work as expected on iOS, but gives an error in android. The error is 'TypeError: Network request failed'. Doing a bit of debugging, I found that the cause of the error seems to be the following: 'java.security.cert.CertPathValidatorException: Trust anchor for certification path not found'.
How come this works in iOS and not on android, and how do I best fix it? Is the fault in react-native, or somewhere deeper?
There is a few workarounds for this issue mentioned here: Trust Anchor not found for Android SSL Connection
However, if you are the server owner. I would suggest to review your server ssl certificate. I think that was because of missing CA certificate in your pem file. What I have done for my site is I created fullchain.pem by concating content of file.crt and file.ca-bundle as that order.
Then I configure nginx (my server behind nginx) with: ssl_certificate /etc/nginx/ssl/fullchain.pem;
The original document: https://www.digicert.com/ssl-certificate-installation-nginx.htm
Hope that helps