Problems with formatter in dynamic list

I wrote earlier in the thread "New site"
I'm having an error when I try to filter articles by month. In English
(en), when I click on the month (for example, Apr), it reloads the Dynamica
list and shows me the articles from that month. When I do the same thing in
Galician (gl), instead of reloading the Dynamica list, it sends me to
another site and shows me the following:

/opencms/system/modules/alkacon.mercury.template/formatters/list/
El recurso solicitado
"/opencms/system/modules/alkacon.mercury.template/formatters/list/" no se
encontró en el servidor.

I've tried changing the language and properties, but I can't get the
behavior to be the same as in en. Could you help me?
I don't know if it will help, but in the filter, the month appears in
uppercase (Apr.), and in the dynamic list view, it appears in lowercase
(apr.).
Thanks in advance.

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