How to reconnect Siri Shortcuts to Dropbox?

I have some Shortcuts using Dropbox actions (such as “Get Dropbox File”). Now whenever I try to run them, I get this error: > An unknown error occurred (invalid_access_token/) This started to happen after I disconnected all my apps from Dropbox due to some security concerns. Other apps allow me to easily reconnect to Dropbox, but I couldn’t find a way to do that in Shortcuts. So how can I reconnect Siri Shortcuts to Dropbox? (That would also be useful for switching the Dropbox account connect to Siri Shortcuts, by the way).