Hi,

I have 2.7 installed and can't upload photos. Here is how to reproduce the issue.

Visit the add photo page and select an existing album (admin.php?page=photos_add&section=direct)

Click `Add Photos` and select a photo. The photo is then listed in the `Select Files` table with file size and status of 0%.

Click `Start Upload` and the upload progress bar is shown at the bottom. Once the progress bar reaches 100% the page updates and only shows that progress bar.

The JS console has the following messages:

Uncaught SyntaxError: Unexpected token < admin.php?page=photos_add&section=direct:1
Uncaught TypeError: Cannot read property 'id' of null admin.php?page=photos_add&section=direct:449






Piwigo version: 2.7.4
PHP version: PHP: 5.5.9-1ubuntu4.6
MySQL version: MySQL: 5.5.5-10.0.17-MariaDB
Piwigo URL: Internal at this time