Hello,
Did you do backup files before the update?
Make sure that translation files of the theme are placed in /wp-content/languages/themes/ folder
plugins, like core plugin on your screenshot, in /wp-content/languages/plugins folder.
After every update, you need to synchronize translation – https://xstore.helpscoutdocs.com/article/103-translation-files-update Sometimes new strings are added, and only after synchronization, you’ll be able to translate new strings or strings that were changed. Not always, but some strings can be missing after the sync and you need to find and translate them one more time, this is independent of us and relates to WP functionality. Also, do a backup of all the files before any update – https://xstore.helpscoutdocs.com/article/63-theme-update
Regards