No show message User or password incorrect

Hi team support Newspaper theme,
When I active plugin Paid Memberships Pro, login form no validate well, no show message “User or password incorrect!” when I insert a bad password o email.

I see in device consoler browser and has a problem with code Jquery file “tagdiv_theme.min.js”. Only ocurred if I active this plugin Paid Memberships Pro.

Somebody may help. Is important add this plugin for subscriber.
Thanks. Pedro García Ródenas.

I attach a screenshot:
http://plantilla.elperiodicodeyecla.com/wp-content/uploads/2021/01/error-validate-login-user.png

And copy error consoler browser:
VM5235:1 Uncaught SyntaxError: Unexpected token < in JSON at position 0
at JSON.parse (<anonymous>)
at Function.n.parseJSON (jquery.js?ver=1.12.4-wp:4)
at Object.success (tagdiv_theme.min.js?ver=10.3.9.1:252)
at i (jquery.js?ver=1.12.4-wp:2)
at Object.fireWith [as resolveWith] (jquery.js?ver=1.12.4-wp:2)
at x (jquery.js?ver=1.12.4-wp:4)
at XMLHttpRequest.c (jquery.js?ver=1.12.4-wp:4)

I think that is a conflict with admin-ajax.php response, when plugin Paid Memberships Pro is active return the html code with login page structure. Then if I disactive plugin return well datas [“login”,0,”Usuario o contrase\u00f1a incorrecta!”].

If you know about admin ajax you tell me.

I resolved, Is a problem with hook ‘wp_login_failed’ that plugin Paid Memberships Pro adds.