Install "kio_recoll"?

Yes, this is what I did. And yes, you said contact the “Maintainer”. I understood who “maintains” the app i.e. the developer not the “maintainer” of the package in Arch/EOS repos! Sorry, may be a “technical” misunderstanding from me and maybe because English is not my mother tongue! Plus I am only 3 months old on Arch!
My simple understanding is that the errors says the file is not on the developers website.
So, it is true the problem is on our side (Arch side)?

If so, how-to?

P.S: I have tried, installed spellcheckers and dictionaries, uninstaled and reinstalled Zim, Spel check is working fine now in LibreOffice and Kate…
Please check Spell Check not Working for details.