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Error when logging in through iOS App

Posted: October 13, 2021 at 12:14 pm


October 13, 2021 at 12:14 pm

Have tried logging in on multiple iPads and keep getting the pop up error stating:

Error Occurred
The server was acting as a gateway or proxy and received an invalid response from the upstream server.

Extra information listed below
The current iOS on iPad: 9.3.5
App Version: 2.7.1
Was able to log in using iPhone 11 Pro Max with iOS 15
Copy/Pasted URL to site to ensure I was using the correct app



  • Support Staff

October 13, 2021 at 12:37 pm

Hi there,

What is the full string you are using in the Website URL field?

Can you send me temp login details so I can test logging in?

If so you can do so using this form:


  • Support Staff

October 13, 2021 at 2:17 pm

Hi there,

Using the credentials provided I’m not running into any issues logging into the app.

I’ve test on both iOS and Android without issue.

Try logging into the app using only the domain name, no schema etc so not:




The error you’ve posted can also happen if a security plugin (or something on the server) is blocking specific requests and or headers on that request but without reproducing I can only guess right now.


October 14, 2021 at 6:23 pm


I’ve noticed that this issue only occurs on my iPads that run iOS 9.3.5 and does not occur on the iPads that can update past that iOS. This is an issue as our event occurs tomorrow and this is how we scan individuals in. Do you have an idea on how to fix this issue?




  • Support Staff

October 15, 2021 at 9:28 am

Hi Dustin,

Unfortunately, I don’t have an iPad that runs that version, the lowest I have is iOS10 and I’ve just tested with that, again no issues.

Without being able to reproduce this is going to be really difficult to troubleshoot.

You can try adding the WP REST API Log plugin:

Then try to log in and let me know the time you tried, I’ll take a look at the logs and see if anything stands out (note that with the error you are getting we may not get anything useful in the logs).

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