Error when uploading an image to profile using Custom Fields

Hello,

I'm using the "file" custom field in my users profiles.
My community is for teachers and the idea is for each teacher to upload the logo of their school (jpg) .

When I upload the image, there's no problem, but when I save the changes I get this error:

Catchable fatal error: Object of class stdClass could not be converted to string in /home/laiyla/public_html/administrator/components/com_easysocial/tables/field.php on line 1107

I'm attaching the images of the steps to the problem and super user access.
Please, don't update!
I have several customizations directly written to the template files!

Thank you!