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create file in dropbox

I've a simple flow that looks for a specific email that has a specific attachment that would then copy this attachment from email to Dropbox. 


This has been running for a number of weeks without issues until today when the Create File action fails with the following message:


InvalidTemplate. Unable to process template language expressions in action 'Create_file' inputs at line '1' and column '2341': 'The template language function 'base64ToBinary' expects its parameter to be a string. The provided value is of type 'Null'. Please see for usage details.'.


This seems to be an error thrown by the code in the action and not related to any flow logic. 


Could you please let me know who to contact to have this resolved?


Thanks and regards,



Community Support
Community Support

Re: create file in dropbox

Hi @ andre_vans,


Could you please share a screenshot of the configuration of your flow?


The error message told that  you have provided a null value in the "Create file" action?


Do you use the trigger "When a new email arrives" in your flow?Could you please share a bit more details about the configuration of the trigger?


If you use the trigger "When a new email arrives" in your flow,please make sure you have set the "Has Attachment" field and the "Include Attachments" field to Yes as screenshot below:



Please share more details so we could try to help you.


Alice Zhang

New Member

Re: create file in dropbox

Hi Alice, 

Herewith the workflow:




There is really not much more that I can configure. As i mentioned, the flow used to work fine for a number of weeks and then started failing with the initially provided error. Based on the error it seems to be something that _might_ have changed on the Dropbox action in that it might be expecting additional input to function - but i really don't know. 

Community Support
Community Support

Re: create file in dropbox

Hi @andre_vans,


Could you please share a full screenshot of the configuration of the "Create file" action in your flow?

Please take a try to re-create the flow from scratch.

Please let me know id the issue still exists.



Alice Zhang

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