Our search works on English language homepage, but if we switch using language switcher drop down to another language the search is not indexing posts.
Was it working okay before the move? If so, then it is definitely something to do with that. Either the database didn’t migrate properly, or something might be missing.
Can you add temporary FTP and back-end acces? I would like to do a few tests and debug the code.
Can you please update the plugin to the latest release (4.23.3), you are using a very outdated version. Then make sure to re-create the index so everything is refreshed. That may resolve the issue.
If not, then can you please also add temporary FTP access? Thank you!