When I upload a pdf file with pics and writing, all the writing turns in gibberish symbols & squares

Hey Helen2194, I hope you're doing well!

Does this happen on a specific platform? 

How do you try to preview these pdf files? If you have any screenshots feel free to send it over, in order for me to also have a visual. 

Keep me posted!

It is whilst I am in dropbox, after uploading the file, the preview is what looks unreadable.

Hey Helen2194, thanks for the update and the screenshot.

Is the text in English or a different language?

Also, do you see the same if you preview your file on a different browser or a private browsing/incognito window?

I have since deleted the files so cant preview them again for you.  They were in English

Hey Helen2194, that's odd indeed.

But there's not much troubleshooting to do if the file has been deleted.

However, if this happens again with the same (or even a different file) don't hesitate to let us know, and we'll definitely keep an eye on this!

As I couldn't get a solution in time, I made my pdf from scratch again and it uploaded correctly.  I was trying to avoid that and find a solution as recreating it took me hours.