Hello, im new to Mendix and wanted to build an App to upload Files. I tried to do it with an File manager and File Upload but that didnt work because there was no "association". Then after that i tried the File Dropper widget from the store and now i have this error could someone explain to me how this error works and how i can fix it? Or maybe you have another idea on how to upload files in mendix, then please let me know your thoughts. Thank you in advance.