Error Gallery HTML

When creating html galley, “error during loadin.Please try again” appears. Only one animation appears but the html can not be seen.
What could be the problem?
Thank you

Hi @rzamorano

What version of OJS are you using? Do you have some more details about that error? PHP and Browser’s logs can be helpful for debugging.

Thanks, but I discovered the problem. The error is generated in the first lines of the html or xhtml. When writing the following, the problem is solved:
<! DOCTYPE html PUBLIC “- // W3C // DTD XHTML 1.0 Transitional // EN” “”>

Current version OJS Thanks :-)