We have a desktop app and a mopbile app, but nothing prevents the user from using the desktop app on the phone.

I've addressed the issue by using the download function instead of render when on a mobile device.

I just thought I should let you know.

I'm probably running an older version of the product, but can reproduce it in the playground, here:

https://playground.jsreport.net/w/admin/lbhULCsP

Run the report on an android phone using chrome and you get that error. Downloading the pdf works fine.

This is what it looks like in the playground:

This is the error in the browser console:

Any thoughts, guidance?

I'm having this very same problem and it seems to me that it is right right that this is what should be happening. After all the jsreport:jsreport has no permissions on that volume.