Mobile extension don't work live

Running a test against SSL Labs will tell you what issues exist with your SSL configuration.

The linked thread was discussing android. And android has a different set of Cipher sets preferred for SSL

This involved making a modification to the server that hosts your API to cite a different set of acceptable Ciphers. Which involves modifiy NGINX/Apache/whatever as needed.

If you are using LetsEncrypt it usually ships with a recommened cipher set. But you should investigate yourself and find where the SSL issue is as it might not be cipher sets, it might be a incomplete certificate setup, like did you use the correct fullchain?