API error upon uploading expenses (error 410 and 403)

Hi all!
We are using the Expensify support on a monthly basis to upload our expenses from a .csv file. It has been working smoothly for the past 1+ year, but today we are struggling with some issues.
More specifically, we are running into the following issues:
1. Upload 1 expense – it works
2. Upload another set of expenses – it fails, with error 410 ("Could not created transaction list")
3. Upload any other expense – it fails, with error 403 ("Authentication error, Unauthorized source")
4. It then becomes impossible to upload anything for a certain time, and then the API becomes available again. (I guess the unauthorized authentication times out at some point)
Anyone ever seen these errors popping and would know a reason why these happened?
Thanks!
Ivan
Answers
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Hey @ivanprobst !
Can you please email [email protected], include your API template, the last expense file that failed, and a reference to this post? We'll check everything out and let you know what went wrong! Thanks so much for reporting this!
To the Community:
Please do still feel welcome to add your own cases or any thoughts you have that can help this topic.