Warning: “continue” targeting switch is equivalent to “break”

Help, i have this warning on mi website:
Warning: “continue” targeting switch is equivalent to “break”. Did you mean to use “continue 2”? in /home/s1376b60/public_html/wp-content/plugins/qtranslate-x/qtranslate_frontend.php on line 497

and this others in the backend:
Warning: substr() expects parameter 1 to be string, array given in /home/s1376b60/public_html/wp-content/plugins/qtranslate-x/admin/qtx_admin.php on line 783

Warning: substr() expects parameter 1 to be string, array given in /home/s1376b60/public_html/wp-content/plugins/qtranslate-x/admin/qtx_admin.php on line 784

Warning: substr() expects parameter 1 to be string, array given in /home/s1376b60/public_html/wp-content/plugins/qtranslate-x/admin/qtx_admin.php on line 788

Warning: substr() expects parameter 1 to be string, array given in /home/s1376b60/public_html/wp-content/plugins/qtranslate-x/admin/qtx_admin.php on line 788

Warning: strpos(): Offset not contained in string in /home/s1376b60/public_html/wp-content/plugins/qtranslate-x/admin/qtx_admin.php on line 783`

Somebody knows what is the problem?

Thanks.

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