Error in pdf - PDF.js v2.6.347

ojs 3.3.0-6
i have this problem.
i dont know how to solve this problem
thanks for your help.
Screenshot from 2021-06-30 14-00-12

Hi @dios98,

According to the console message, the PDF file is missing (e.g., deleted from the system or permission problem).
Are there any associated errors in PHP log? The message there may clarify the problem