Load image from Server HTTPS error

Hi everyone,
I have a game play on Android API 26.
And, i can’t load a image from server HTTPS , my logcat below:

W/System.err( 1625): javax.net.ssl.SSLHandshakeException: java.security.cert.CertPathValidatorException: Trust anchor for certification path not found.
W/System.err( 1625):    at com.android.org.conscrypt.OpenSSLSocketImpl.startHandshake(OpenSSLSocketImpl.java:409)
W/System.err( 1625):    at a.a.a.a.e.d.j.a(Unknown Source)
W/System.err( 1625):    at a.a.a.a.e.d.j.a(Unknown Source)
W/System.err( 1625):    at a.a.a.a.e.d.j.a(Unknown Source)
W/System.err( 1625):    at a.a.a.a.e.c.k.a(Unknown Source)
W/System.err( 1625):    at a.a.a.a.i.c.h.a(Unknown Source)
W/System.err( 1625):    at a.a.a.a.i.c.b.a(Unknown Source)
W/System.err( 1625):    at a.a.a.a.i.c.c.a(Unknown Source)
W/System.err( 1625):    at a.a.a.a.i.b.p.a(Unknown Source)
W/System.err( 1625):    at a.a.a.a.i.b.p.a(Unknown Source)
W/System.err( 1625):    at a.a.a.a.i.b.a.a(Unknown Source)
W/System.err( 1625):    at a.a.a.a.i.b.h.a(Unknown Source)
W/System.err( 1625):    at com.c.a.a.f.c(Unknown Source)
W/System.err( 1625):    at com.c.a.a.f.d(Unknown Source)
W/System.err( 1625):    at com.c.a.a.f.run(Unknown Source)
W/System.err( 1625):    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:422)
W/System.err( 1625):    at java.util.concurrent.FutureTask.run(FutureTask.java:237)
W/System.err( 1625):    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
W/System.err( 1625):    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
W/System.err( 1625):    at java.lang.Thread.run(Thread.java:841)
W/System.err( 1625): Caused by: java.security.cert.CertificateException: java.security.cert.CertPathValidatorException: Trust anchor for certification path not found.
W/System.err( 1625):    at com.android.org.conscrypt.TrustManagerImpl.checkTrusted(TrustManagerImpl.java:282)
W/System.err( 1625):    at com.android.org.conscrypt.TrustManagerImpl.checkServerTrusted(TrustManagerImpl.java:202)
W/System.err( 1625):    at com.android.org.conscrypt.OpenSSLSocketImpl.verifyCertificateChain(OpenSSLSocketImpl.java:611)
W/System.err( 1625):    at com.android.org.conscrypt.NativeCrypto.SSL_do_handshake(Native Method)
W/System.err( 1625):    at com.android.org.conscrypt.OpenSSLSocketImpl.startHandshake(OpenSSLSocketImpl.java:405)
W/System.err( 1625):    ... 19 more
W/System.err( 1625): Caused by: java.security.cert.CertPathValidatorException: Trust anchor for certification path not found.
W/System.err( 1625):    ... 24 more

@slackmoehrle help me? :((

It seems this is the reason. SO post or Duck Duck Go