2024-08-22, 04:19 PM
(This post was last modified: 2024-08-22, 04:23 PM by TheDreadPirate. Edited 4 times in total.)
Can you check which of Let's Encrypt's root authorities issued the cert? Certificates issued by ISRG Root X2 and Intermediates E5 and E6 are not trusted by older versions of Android.
https://letsencrypt.org/docs/certificate-compatibility/
https://letsencrypt.org/docs/certificate-compatibility/