I think the game doesn't have enough permissions to write to your device storage. Does the game have enough permissions and is there any security software running on your device?
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Thank you for your quick reply. I seem to have all permissions on, but I must have missed something. The error seems to be an issue on a wider front, so will see what I can do to resolve it in a different way.
For now, if it helps, I am using a Samsung Galaxy S21, which I believe should not be an issue. That being said, I did not have this challenge when using a one plus 5. Any ideas/help that comes to mind however, I'd still very welcome!