I got this error on android 9 devices and above when my react native app tried to send post requests which had large image and base64 data to my api which ran nginx as a reverse proxy.
What happened was the request wouldn't get sent however nginx would send a 413 response which actually indicates that the received request is too large.
My solution was :

1. <skip this if you aren't using an express api> set a request size limit in the express api like so:

app.use(express.json({limit: '50mb'}));app.use(express.urlencoded({limit: '50mb'}));

1. adjust nginx request size limit-> access nginx config filein ubuntusudo nano /etc/nginx/nginx.confthen add this lineclient_max_body_size 50M; inside the 'http{ ... }' block.

Cheers.
my twitter