Child Them Configurator Plug In Msg. on Hemingway Thm

Hi, question on using Child Theme Configurator Plug In Analyzer (php debug) on my Hemingway Theme. It created the following message output:
Warning: session_start(): Cannot send session cache limiter – headers already sent (output started at /var/www/web27492794/html/galaxypersonal.de/wp-content/plugins/transposh-translation-filter-for-wordpress/transposh.php:50) in /var/www/web27492794/html/galaxypersonal.de/wp-content/plugins/wp-file-upload/wordpress_file_upload.php on line 2

Notice: Undefined index: widget_file in /var/www/web27492794/html/galaxypersonal.de/wp-content/plugins/transposh-translation-filter-for-wordpress/wp/transposh_widget.php on line 165

Notice: Undefined index: widget_file in /var/www/web27492794/html/galaxypersonal.de/wp-content/plugins/transposh-translation-filter-for-wordpress/wp/transposh_widget.php on line 188

Notice: Undefined index: widget_file in /var/www/web27492794/html/galaxypersonal.de/wp-content/plugins/transposh-translation-filter-for-wordpress/wp/transposh_widget.php on line 254

Notice: Undefined index: title in /var/www/web27492794/html/galaxypersonal.de/wp-content/plugins/transposh-translation-filter-for-wordpress/wp/transposh_widget.php on line 271

Now, this is something to be handled in order to create a childtheme. There seems to be a problem with the transposh plug in. What would be the reason for being a problem in line with the child theme? I use transposh to translate my site pages.
And how could I debug this.

Infos to this would be great.

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