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E/paypal.sdk: request failed with server response:Certificate pinning failure!
Peer certificate chain: sha1/SQ+EdYjo3ZoEORzSEC2JQV3g3L4=: CN=api-m.paypal.com,OU=CDN Support,O=PayPal\, Inc.,L=San Jose,ST=California,C=US sha1/UCM4nF92oH7yVEZeTyGW+BRFtB4=: CN=Symantec Class 3 Secure Server CA - G4,OU=Symantec Trust Network,O=Symantec Corporation,C=US
Pinned certificates for api-m.sandbox.paypal.com: sha1/u8I+KQuzKHcdrT6iTb30I70GsD0= sha1/7Q3I1izTEynYgv4tw/zFENNNuxQ= sha1/sYEIGhmkwJQf+uiVKMEkyZs0rMc= sha1/gzF+YoVCU9bXeDGQ7JGQVumRueM=
01-21 13:04:51.999 20902-20902/sprittle.com.sprittle E/paypal.sdk: SERVER_COMMUNICATION_ERROR
try this change your paypal sdk version
android studio change in gradle
is old paypal sdk : PayPalAndroidSDK-2.11.2.jar to change add new paypal sdk : compile 'com.paypal.sdk:paypal-android-sdk:2.13.1'
eclipse add new paypal.sdk:paypal-android-sdk:2.13.1.jar file and bulid
Version 2.13.0 of the PayPal Android SDK should fix the issue.
PayPal sandbox recently upgraded to only allow TLS 1.2 and made other pre-emptive security updates ahead of PCI compliance requirements. You can find out more details at the InfoCenter microsite.