Translate language file

I want to translate english language file to new language.
I added new language and I got an error:

Error: The actual loaded translation content does not match the textdomain: tsa
Expect, that any text you translate will not occure as long as the textdomain is mismatching!
This is a coding issue at the source files you try to translate, please contact the original Author and explain this mismatch.

I also got a warning:
Scripting Guard [ details ] The Plugin Codestyling Localization was forced to protect its own page rendering process against 2 incidents

DETAILS:
Malfunction at 3rd party Plugin detected!
Name: WordPress SEO | Author: Joost de Valk
Below listed scripts has been automatically stripped because of injection:
http://XY.com/wp-content/plugins/wordpress-seo/js/wp-seo-admin-global.js
Malfunction at 3rd party Plugin detected!
Name: WP Time Slots Availability Calendar | Author: WP Time Slots Availability Calendar
Below listed scripts has been automatically stripped because of injection:
http://XY.com/wp-content/plugins/wp-time-slots-availability-calendar/js/tsa-admin.js

Can you please tell me how to localize plugin?

http://ww.wp.xz.cn/plugins/wp-time-slots-availability-calendar/