Here is the error:
2018-07-20 02:39:21.994486+0800 RKClassroom[6123:64035] [BoringSSL] Function boringssl_session_errorlog: line 2866 [boringssl_session_handshake_continue] SSL_ERROR_SSL(1): operation failed within the library
2018-07-20 02:39:21.995935+0800 RKClassroom[6123:64035] [BoringSSL] Function boringssl_session_handshake_error_print: line 2805 boringssl ctx 0x7fe99d60f710: 140641385318672:error:10000410:SSL routines:OPENSSL_internal:SSLV3_ALERT_HANDSHAKE_FAILURE:/BuildRoot/Library/Caches/com.apple.xbs/Sources/boringssl_Sim/boringssl-109.50.14/ssl/tls_record.c:547:SSL alert number 40
2018-07-20 02:39:21.996771+0800 RKClassroom[6123:64035] [BoringSSL] Function boringssl_session_handshake_error_print: line 2805 boringssl ctx 0x7fe99d60f710: 140641385318672:error:1000009a:SSL routines:OPENSSL_internal:HANDSHAKE_FAILURE_ON_CLIENT_HELLO:/BuildRoot/Library/Caches/com.apple.xbs/Sources/boringssl_Sim/boringssl-109.50.14/ssl/handshake_client.c:946:
2018-07-20 02:39:21.997986+0800 RKClassroom[6123:64035] [BoringSSL] Function boringssl_context_get_os_status: line 4268 SSL_AD_HANDSHAKE_FAILURE
2018-07-20 02:39:22.004829+0800 RKClassroom[6123:64035] TIC TCP Conn Failed [1:0x60000016ad40]: 3:-9824 Err(-9824)
2018-07-20 02:39:22.005981+0800 RKClassroom[6123:64035] NSURLSession/NSURLConnection HTTP load failed (kCFStreamErrorDomainSSL, -9824)
2018-07-20 02:39:22.006082+0800 RKClassroom[6123:64035] Task <88D1658F-B83C-42FA-923D-B2AD4D717EDA>.<1> HTTP load failed (error code: -1200 [3:-9824])
2018-07-20 02:39:22.006391+0800 RKClassroom[6123:63556] Task <88D1658F-B83C-42FA-923D-B2AD4D717EDA>.<1> finished with error - code: -1200
How could i solve it?
