Hello Tuan,
There's a problem with the extension file types allowed.
In fact you may not validate the document page upload, there's a message, "you may not move the file" , BUT, in front you have the right error message.
So the logic in back office seems strange...or different from the front, which is strange.
Also, in front office, the field thumbnails and files are inverted, so thumbnails coming first may disturb users.
It could be great to have this thumbnail defined as an option into configuration.
Could you please correct this ?
Thanks
