Cannot download file from filings endpoint

For some files I get the following error when trying to download certain file urls, e.g. for emea1-apps.platform.refinitiv.com/Apps/AdvFilings/FRS_GET?DocumentId=78170311&ContentFormat=pdf):

Document request failed, Exception is Could not find file 'D:\FRS\FRSWorkingFolder\fa16ed98-1057-4fd2-b151-1e37aebdde60\78170311.pdf'.

I also have found this error when loading docs for the following ‘formName’:

• ARS
• Earnings
• Earnings_Prelim_Full_Year
• Earnings_Q1/Q2/Q3
• Japanese_Other_(English_Filing)

For most files I try I am able to download, it is just the ones above that I can't download.

Is this a permission issue for certain files? Are these files not available anymore? Please could someone help. Thanks1