I have Moodle Version 3.1 and Adaptable template, i was tried a lot to find the reason in the front end but no luck.Afterall in the adaptable/layout/include/footer.php i found the following line:
echo $OUTPUT->standard_end_of_body_html()
This what makes the error,when i comment out it the unwanted "Footer info string" dissapear,the issue is that i have read this line must have to render the page correctly.
So i need to remove that string from the $OUTPUT->standard_end_of_body_html() but dont know how, the best would be to find where it is get that value and prevent there.
thank you for your help