This problem is due to a bug in the Xulu launcher that was causing Xulu content files to marked as not writable. This bug has been fixed, but these files are still marked as non-writable. To correct the problem use a File Explorer Window to go to the directory that contains the file specified in the error message. Manually select and delete that entire directory, then re-start the Xulu system. Note that you may get this same error message a few more times for different files in the installation. Keep performing the above steps until you no longer get the error message and the launcher completes the update.
