Hey @Megatonsohrab! Thanks for posting on our forum.
Since you mention refreshing your page, I assume you’re using the Dropbox website, correct?
What’s the total size of files you’re trying to upload at once? Mind you, there’s a 50GB size limit when using the Dropbox website.
Have you tried uploading your files in even smaller batches or does this fail, too?
Keep me in the loop for more info.