ID:24397 Cannot create the assignment and write to the Intel Quartus Prime Settings File.

CAUSE: You attempted to set an assignment, but the Intel Quartus Prime software cannot create the assignments due to one of the following situations:

The specified Quartus Prime Settings File (.qsf) is in use by another user.
The project and its files are designated as read-only.
The file does not exist.

ACTION: Verify that the Intel Quartus Prime Settings File exists. You cannot edit an Intel Quartus Prime Settings File that is read-only, so save the file with a new file name or in a different directory. Click the + icon to expand this message in the Messages window to view more details about the assignment.