Comment 3 for bug 1943613

Note that after this fix, the following warning message will still be printed to the log:

      Search and replace in file
      • File path.............................. isolinux/txt.cfg
      • Waring................................. No tree iter found

This is normal behavior. The messages indicates that "isolinux/txt.cfg" does not exist and will not be added to the tree view on the Boot tab. (Initially, "isolinux/txt.cfg" is listed as one of the required boot files that should always be shown, even when "Show all files" toggle button is not active. "isolinux/txt.cfg" is automatically removed from the list of required boot files when the user navigates to the next page, from the Options page.)