[Cerrado] Translate plugin string from WP Review Slider PRO

Background of the issue:
I am using the plugin WP Review Slider Pro. The plugin has front end focused texts 'read more', 'read less', 'load more' that I need to translate. The default text is in English, but the plugin is not translated yet. The plugin offers input fields to overwrite the default text, but that is only for one language. I need a way to translate the input strings or translate the default texts. I looked in string translation but can't find the strings for these input fields. I have a .pot file and I used poedit to create a .po file, but if I try to upload that to ptc.wpml.org I keep getting an error 'Our system ran into a glitch. Please go back and try again.'

-- STOP USING AI TO REWRITE MY QUESTIONS !!! --
Hello, I am using the plugin WP Review Slider Pro. The plugin has front end focussed texts 'read more', 'read less', 'load more' that I need to translate. The default text is in English, but the plugin is not translated yet. Besides that, the plugin offers input fields to overwrite the default text, but that's only for one language, so I need a way to, preferably, translate the input strings or translate the default texts. What is the best way to do that?

I looked in string translation, but can't find the strings for these input fields. Is there a way to add them? If so, how?

--
The other alternative would be to translate the entire plugin, but I get stuck there too. I found this article
https://wpml.org/documentation/support/translating-the-theme-you-created/

I have a .pot file and I used poedit to create a .po file, but if I try to upload that to ptc.wpml.org I keep getting an error "Our system ran into a glitch. Please go back and try again."

Symptoms:
I can't find the strings for the input fields in string translation. I get an error 'Our system ran into a glitch. Please go back and try again.' when uploading a .po file to ptc.wpml.org.

-- STOP USING AI TO REWRITE MY QUESTIONS !!! --
Hello, I am using the plugin WP Review Slider Pro. The plugin has front end focussed texts 'read more', 'read less', 'load more' that I need to translate. The default text is in English, but the plugin is not translated yet. Besides that, the plugin offers input fields to overwrite the default text, but that's only for one language, so I need a way to, preferably, translate the input strings or translate the default texts. What is the best way to do that?

I looked in string translation, but can't find the strings for these input fields. Is there a way to add them? If so, how?

--
The other alternative would be to translate the entire plugin, but I get stuck there too. I found this article
https://wpml.org/documentation/support/translating-the-theme-you-created/

I have a .pot file and I used poedit to create a .po file, but if I try to upload that to ptc.wpml.org I keep getting an error "Our system ran into a glitch. Please go back and try again."

Questions:
Is there a way to add the strings for the input fields in string translation?
What is the best way to translate the input strings or default texts?
How can I resolve the error when uploading a .po file to ptc.wpml.org?

-- STOP USING AI TO REWRITE MY QUESTIONS !!! --
Hello, I am using the plugin WP Review Slider Pro. The plugin has front end focussed texts 'read more', 'read less', 'load more' that I need to translate. The default text is in English, but the plugin is not translated yet. Besides that, the plugin offers input fields to overwrite the default text, but that's only for one language, so I need a way to, preferably, translate the input strings or translate the default texts. What is the best way to do that?

I looked in string translation, but can't find the strings for these input fields. Is there a way to add them? If so, how?

--
The other alternative would be to translate the entire plugin, but I get stuck there too. I found this article
https://wpml.org/documentation/support/translating-the-theme-you-created/

I have a .pot file and I used poedit to create a .po file, but if I try to upload that to ptc.wpml.org I keep getting an error "Our system ran into a glitch. Please go back and try again."