Android: Login is broken when using self-signed certificates

[balporig]

The root CA has been imported in the system trust store and and the web version in chrome works file without any certificate errors, but the Android app fails with:

1736320032.476 14271 32677 18459 I o1.b    : API call failed, pausing before retry number 2
1736320035.519 14271 32677 18459 E CONSCRYPT: ------------------Untrusted chain: ----------------------
...
1736320035.531 14271 32677 18459 E o1.c    : Error (java.security.cert.CertPathValidatorException: Trust anchor for certification path not found.) calling https://newsblur.local/api/login
1736320035.531 14271 32677 18459 E o1.c    : javax.net.ssl.SSLHandshakeException: java.security.cert.CertPathValidatorException: Trust anchor for certification path not found.
1736320035.531 14271 32677 18459 E o1.c    : 	at com.android.org.conscrypt.ConscryptFileDescriptorSocket.startHandshake(ConscryptFileDescriptorSocket.java:239)

Android 10-14, latest NewsBlur version