Let's Encrypt certificates will soon become incompatible with Android 7.0 or older
ref: https://letsencrypt.org/2023/07/10/cross-sign-expiration.html
/LE: How to install the cert for Android 7.0 or older: https://www.stoutner.com/lets-encrypt-isrg-root-x1-and-privacy-browser/
Edited by Licaon_Kter