"Couldn't lock the file"

Description of issue or problem I’m having:
Does anyone know what is this showing on the website homepage? “Couldn’t lock the file”

screenshot-submission.pelseducationalvideos.org-2021.07.25-12_19_39

Hi @rakesh9490,

Interesting. That is an error that does sometimes show up in error logs from what I can tell. What version are you running (please include this in your posts, as it aids others in helping to troubleshoot)? Also: can you provide a link to your site form me to have a closer look?

-Roger
PKP Team