I was trying to build a new package…

I was trying to build a new package in bn.wordpress.orgWordPress.org The community site where WordPress code is created and shared by the users. This is where you can download the source code for WordPress core, plugins and themes as well as the central location for community conversations and organization. https://wordpress.org/ and got this error:
Couldn’t copy /tmp/rosettaCTUXBh/bn_BD/messages/bn_BD.moMO files MO, or Machine Object is a binary data file that contains object data referenced by a program. It is typically used to translate program code, and may be loaded or imported into the GNU gettext program. This is the format used in a WordPress install. These files are normally located inside .../wp-content/languages/ to /tmp/rosettaFYt3k8/wordpress/wp-content/languages/bn_BD.mo!

Any pointers?