Opening pages of deleted entries throws error

[MichaelThessel]

in Base.php line 940
at ErrorHandler->handleError('2', 'mdecrypt_generic(): An empty string was passed', '/src/pwx/vendor/phpseclib/phpseclib/phpseclib/Crypt/Base.php', '940', array('ciphertext' => '', 'block_size' => '16', 'this' => object(Crypt_AES)))
at mdecrypt_generic(resource, '') in Base.php line 940
at Crypt_Base->decrypt(null) in CredentialService.php line 52
at CredentialService->get('c4691c0570') in DefaultController.php line 83
at DefaultController->viewPasswordAction('c4691c0570')
at call_user_func_array(array(object(DefaultController), 'viewPasswordAction'), array('c4691c0570')) in HttpKernel.php line 145
at HttpKernel->handleRaw(object(Request), '1') in HttpKernel.php line 66
at HttpKernel->handle(object(Request), '1', true) in Application.php line 543
at Application->handle(object(Request)) in Application.php line 520
at Application->run() in index.php line 5