PDF Invoice / Receipt not working after upgrade

Upgraded from 4.2.6 to 4.2.14

When user try to look at receipts they now get an error.

I suspect it maybe that invoices had custom image uploaded before uprgade but now the admin page for PDF/Receipt settings cannot be displayed.

Log shows this:-

Code:

amember/admin-setup/pdf
 
File does not exists in Am_Storage::assertFileInsideFolder   
 
Click to Expand
Exception Am_Exception_InternalError
Am_Storage->assertFileInsideFolder [ library/Am/Storage.php : 427 ]
Am_Storage_Upload->get [ library/Am/Storage.php : 42 ]
Am_Plugins_Storage->getFile [ library/Am/Form.php : 442 ]
Am_Form_Element_Upload->setValue [ library/Am/Form.php : 499 ]
Am_Form_Element_Upload->updateValue [ library/pear/HTML/QuickForm2/Container.php : 402 ]
HTML_QuickForm2_Container->updateValue [ library/pear/HTML/QuickForm2/Container.php : 402 ]
HTML_QuickForm2_Container->updateValue [ library/pear/HTML/QuickForm2.php : 167 ]
HTML_QuickForm2->setDataSources [ application/default/controllers/AdminSetupController.php : 79 ]
AdminSetupController->displayAction [ library/Am/Controller.php : 139 ]
Am_Controller->_runAction [ library/Am/Controller.php : 116 ]
Am_Controller->dispatch [ library/Zend/Controller/Dispatcher/Standard.php : 295 ]
Zend_Controller_Dispatcher_Standard->dispatch [ library/Zend/Controller/Front.php : 954 ]
Zend_Controller_Front->dispatch 

FIXED. Had to copy hidden files from the cache, as I did a fresh upload.

Hello I have exactly the same problem. I can't garantee but must be since the last upgrade or a server transfer. Can you explain what you did exactly? Would be very helpful. thanks a lot. John