Payment problem

Hi Zorz, I have some question:

1. I try to fund on my example project, but it says fatal error. What is happening?
Fatal error: Uncaught exception ‘PayPal\Exception\PPInvalidCredentialException’ with message ‘Invalid userId ‘ in /home/resounda/public_html/wp-content/themes/fundingpress/funding/lib/paypal/paypal-sdk-core-php-811c13c/lib/PayPal/Core/PPCredentialManager.php:144 Stack trace: #0 /home/resounda/public_html/wp-content/themes/fundingpress/funding/lib/paypal/paypal-sdk-core-php-811c13c/lib/PayPal/Handler/PPPlatformServiceHandler.php(34): PayPal\Core\PPCredentialManager->getCredentialObject(NULL) #1 /home/resounda/public_html/wp-content/themes/fundingpress/funding/lib/paypal/paypal-sdk-core-php-811c13c/lib/PayPal/Core/PPAPIService.php(83): PayPal\Handler\PPPlatformServiceHandler->handle(Object(PayPal\Core\PPHttpConfig), Object(PayPal\Core\PPRequest), Array) #2 /home/resounda/public_html/wp-content/themes/fundingpress/funding/lib/paypal/paypal-sdk-core-php-811c13c/lib/PayPal/Core/PPAPIService.php(63): PayPal\Core\PPAPIService->runHandlers(Object(PayPal\Core\PPHttpConfig), Object(PayPal\Core\PPRequest)) #3 /home/resounda/public_h in /home/resounda/public_html/wp-content/themes/fundingpress/funding/lib/paypal/paypal-sdk-core-php-811c13c/lib/PayPal/Core/PPCredentialManager.php on line 144

2. Is there any possibility to Fund the project via Bank transaction? Because the using of paypal is not so popular in my place.
3. I would like to use Indonesian Rupiah (IDR) currency for funding. Do I need to customized it or there will be update for this thing?
4. Can I put another social media button (in header) like instagram account, etc?

Thanks.