Error

Error #0401: unable to copy file "XXX" to "YYY", no source file found or no access
 

Error description

The program gets access error when you copy downloaded file in the chat via menu "Save as".

 
Problem solution

It can only happen if a source file was deleted manually right after using the menu item "Save as" and before resaving. Perhaps, you have some tricky configuration for saving received files that differs from the default one. In this case, a log record clearly displays from which location the program attempted to copy the file and its destination.