I don’t know what API Infuse is using to access Dropbox, but there is some issue with it. Because, every couple of days, I get an email from Dropbox like below and Dropbox stops working for few hours.
This email is an automated notification from Dropbox letting you know that your Public links have been temporarily suspended for generating excessive traffic.
Upgrade your Dropbox account today to increase the total amount of traffic your link and file requests can generate.
I request Infuse team to shift to using native API or other alternative so that this issue gets resolved.