Problems with OAI-PMH validator - ListRecords response well-formed but invalid. OJS 3

Description of issue or problem I’m having:
Hi I’m trying to validate URL using the
But the result passes the first tests, but this one shows an error:

ERROR: ListRecords response well-formed but invalid: Element ‘{XML Schema 1}element’, attribute ‘ref’: The QName value ‘{ 1}title’ does not resolve to a(n) element declaration., line 23

Reading pkp forum i’d found that this matter was solved by BASE in 2020 but, for some reason still giving that error. I don’t know what to do. Please some one can help me?
Additionally REDIB tell that they can’t retrieve our data due to this error

Thank you in advance


Hola @Yuniel_Ernesto_Marti ,
Esto al parecer es un problema fuera del OJS, revista esta respuesta que quizás pueda ayudarte.