Paypal error Sandbox mode

Hello, when I push “commit to funding” I have this error:
Please wait while we process your transaction..

Fatal error: Uncaught exception ‘PayPal\Exception\PPConnectionException’ with message ‘error:14077410:SSL routines:SSL23_GET_SERVER_HELLO:sslv3 alert handshake failure’ in /home/matteoerly/www/landing/wp-content/themes/fundingpress/funding/lib/paypal/paypal-sdk-core-php-811c13c/lib/PayPal/Core/PPHttpConnection.php:95 Stack trace: #0 /home/matteoerly/www/landing/wp-content/themes/fundingpress/funding/lib/paypal/paypal-sdk-core-php-811c13c/lib/PayPal/Core/PPAPIService.php(73): PayPal\Core\PPHttpConnection->execute(‘requestEnvelope…’) #1 /home/matteoerly/www/landing/wp-content/themes/fundingpress/funding/lib/paypal/paypal-sdk-core-php-811c13c/lib/PayPal/Core/PPBaseService.php(65): PayPal\Core\PPAPIService->makeRequest(‘Preapproval’, Object(PayPal\Core\PPRequest)) #2 /home/matteoerly/www/landing/wp-content/themes/fundingpress/funding/lib/paypal/paypal-adaptivepayments-sdk-php-1d55682/lib/PayPal/Service/AdaptivePaymentsService.php(256): PayPal\Core\PPBaseService->call(‘AdaptivePayment…’, ‘Preapproval’, Object(PayPal\Types\ in /home/matteoerly/www/landing/wp-content/themes/fundingpress/funding/lib/paypal/paypal-sdk-core-php-811c13c/lib/PayPal/Core/PPHttpConnection.php on line 95

I saw the other answers in this issue but I do not have a file called CallerServices.php in /funding/lib/PayPal/CallerServices.php

Thx.