I really don't know why i got this error, i install and add event and then add product which is user name style, i tried to purchase and server error log appears in ACP Here is the log Code: Error Info ErrorException: Array to string conversion - library/Brivium/StoreProduct/UserNameStyle/Model/ProductPurchase.php:57 Generated By: xxx Stack Trace #0 /home/xxx.com/public_html/library/Brivium/StoreProduct/UserNameStyle/Model/ProductPurchase.php(57): XenForo_Application::handlePhpError(8, 'Array to string...', '/home/xxx.co...', 57, Array) #1 /home/xxx.com/public_html/library/Brivium/Store/Model/ProductPurchase.php(940): Brivium_StoreProduct_UserNameStyle_Model_ProductPurchase->_processPurchaseCache(Array, Array) #2 /home/xxx.com/public_html/library/Brivium/Store/ControllerPublic/Product.php(46): Brivium_Store_Model_ProductPurchase->rebuildProductPurchaseCache('UserNameStyle') #3 /home/xxx.com/public_html/library/XenForo/FrontController.php(351): Brivium_Store_ControllerPublic_Product->actionPurchase() #4 /home/xxx.com/public_html/library/XenForo/FrontController.php(134): XenForo_FrontController->dispatch(Object(XenForo_RouteMatch)) #5 /home/xxx.com/public_html/index.php(13): XenForo_FrontController->run() #6 {main} Request State array(3) { ["url"] => string(47) "https://xxx.com/brs-products/test.3/purchase" ["_GET"] => array(0) { } ["_POST"] => array(3) { ["redirect"] => string(0) "" ["_xfToken"] => string(8) "********" ["_xfConfirm"] => string(1) "1" } } I just bought this addon for $20 and now i can't even use it for a hour, please fix this bug I'm using Credit premium 2.0.14 and php 7.1