Cant attach files from Dropbox on my smartphone

[JnJ]

I have dropbox on my smartphone and am trying to attach a file to an email in Gmail. It goes through the whole process but when I select the file it says 'unable to upload'

[maher1982]

Hello, could you please check this link: https://www.dropboxforum.com/t5/Integrations/Dropbox-attachment-in-gmail/td-p/698735? People there seem to have the same issue, and they received reply & solution from BenDBX