Spanish Support?

Upon installing the plug-in I get the following error:

Some of your translations need updating. Sit tight for a few more seconds while we update them as well.

Updating translations for WordPress (es_ES)…

Could not copy file. /www/www.coactivo.com/public_html/wp-content/languages/admin-es_ES.mo

Translation update failed.

Is there no support for Spanish? Am I doing something wrong in my setup?

https://ww.wp.xz.cn/plugins/event-registration/