Uploaded Files - cannot view when downloading

[GlennMUK]

Hello

I have started using my Krayin version 2.1.2.

When I upload a file to a lead (example word document or PDF, the file appears to attach fine.
However, when I go back to look at the file later, the file downloads (as a random file name such as: 0aoY2cuIM41JB1lUf35pxi9GmAMiGUQvEooFdf0q).
When I try to view/read this file, I cannot.

When I try to open a PDF file in my browser, it says:
We can't open this file
Something went wrong.

When I try to open a word document, it says:

Word found unreadable content in "filename". Do you want to recover the contents of this document? If you trust the source of this document, click Yes.

When I click on Yes, it says this:

*Word experienced an error trying to open the file. Try these suggestions.
*Check the file permissions for the document or drive.
*Make sure there is sufficient free memory and disk space.
Open the file with the Text Recovery converter.

Has anyone experienced a similar problem? Is there a known way to resolve this?

Thanks
Glenn