We have an intallation of 2.4.6. We recently move our installation to a new server. After the migration no dropdown related to the language setting is populated, nor in admin login neither in journal manage. I have attached a snapshot of site administration->languages.
The list of locales available to install is missing, I inspected the dropdown. It seems it has the two languages we had installed correctly, but lists them as empty items:
<option value="en_US" selected="selected"></option> <option value="fr_CA"></option>
I have also checked registry/locale.xml. It matches with the version available in github.
I had cleared cache folder contents (keeping the subdirectories) on the new server. Also I checked AppLocale::getAllLocales returns an array with no item in classes/journal/Journal.inc.php, &getSupportedLocaleNames method.