probeerde net een png-file te uploaden, maar krijg deze foutmelding: De volgende fout is opgetreden: copy(/home/admin/domains/schaatsforum.nl/public_html/internal_data/attachments/1/1383-99d15ed7684a2764f8a071bc88376d92.data): failed to open stream: Permission denied XenForo_Application::handlePhpError() copy() in XenForo/Helper/File.php at line 253 XenForo_Helper_File::safeRename() in XenForo/DataWriter/AttachmentData.php at line 265 XenForo_DataWriter_AttachmentData->_moveFile() in XenForo/DataWriter/AttachmentData.php at line 224 XenForo_DataWriter_AttachmentData->_writeAttachmentFile() in XenForo/DataWriter/AttachmentData.php at line 144 XenForo_DataWriter_AttachmentData->_postSave() in XenForo/DataWriter.php at line 1423 XenForo_DataWriter->save() in XenForo/Model/Attachment.php at line 539 XenForo_Model_Attachment->insertUploadedAttachmentData() in XenForo/ControllerPublic/Attachment.php at line 205 XenForo_ControllerPublic_Attachment->actionDoUpload() in XenForo/FrontController.php at line 351 XenForo_FrontController->dispatch() in XenForo/FrontController.php at line 134 XenForo_FrontController->run() in /home/admin/domains/schaatsforum.nl/public_html/index.php at line 13