Search by author (guest author)

I’m using Issuem pluguin.

I modified theme, and guest authors are shown-

There are two problems.

1- When there are more then one author, they are shown together (Author1yAuthor2 instead Author1 y Author2).

2- When I click on Author1 for example, no results, system only search in pages, not in “articles”. (articles are for issuem)

For 1.

I have modified languajes co-authors-plus-es_ES

#: co-authors-plus.php:39
msgid ” and “
msgstr “y”

by

#: co-authors-plus.php:39
msgid ” and “
msgstr ” y ”

but it dosen’t work

For .2

I understand that you cannot modified this pluging for working with other plugins, but could you tell me how I can modified.

https://wordpress.org/plugins/co-authors-plus/