Hi @thiago,
I tried all the fixes in the troubleshooting page but the solutions did not work. I am seeing the following error:
main.a776e35c.chunk.js:1 WebSocket connection to ‘ws://34.X.X.X:8501/stream’ failed: Error during WebSocket handshake: Unexpected response code: 403. Very similar to @razor.
Any idea why that might be happening?
I am using Streamlit, version 0.62.0
Thanks!
this also suddenly started for me, it was working one moment and it didn’t the next (I didn’t upgrade any packages or install anything) and restarting didn’t help.
Hi @Jorge and @zen1, @thiago flagged this internally to our engineering team, so hopefully we’ll know more shortly.
Best,
Randy
Also seeing this issue today - please keep me posted on a solution or a workground (downgrading to a previous version?). Thanks!
Solved my issue- an upstream load balancer wasn’t passing the websockets correctly.
@mappingvermont, do you mind sharing how you resolve the issue by changing your load balancer? Thanks a lot.
hey @Jack_G!
I should have been more clear- I was trying to deploy behind a load balancer running http-proxy, which doesn’t support websockets. Not sure if this is the case for you, but definitely check if it is. Hope this helps!
It happens to me too, and I am not behind a load balancer. And it happens on all browsers.
A year later I’m still experiencing issues when I deploy to EC2. I’ve gone through the FAQ again, but still couldn’t find a permanent solution to the issue 
@randyzwitch This is an interesting issue that I‘m currently facing. Did you manage to solve it?
I also observed the following: If I open the app in a new tab, the old one completes loading.
may i ask you, where can i acces the ~/.streamlit/config.toml ?
I tried all the troubleshooting things here App is not loading when running remotely - Streamlit Docs and no luck. I’m behind a proxy. It works on most machines, 2 computers and 2 iphones, but it doesn’t work on 2 other iphones, so it is some kind of weird something or other. It just says “Please wait…” on those two unlucky phones.
It looks like if I restart my phone it works once and only once.
Have you worked around this issue?
I am having the same problem here. Nginx is serving my streamlit app trough reverse proxy and it works fine in desktop (Chrome and Firefox) but when I try to access it from an iPhone it gets stuck in “Please wait…”
Having similar issues. I am using AWS ec2 ubuntu and these steps fixed it on my end:
a2enmod proxy
a2enmod proxy_http
a2enmod proxy_wstunnel
hopefully it helps.
Where do we see the logs? Server logs in particular?
