Unable to add attachment to a payment

Hi,

I am having issues attaching a pdf to a payment.
Once selecting the file and clicking save, the save button stays in the constant 'progress' state but never completes or errors.

I do notice this error in the dev console...
"The POST method is not supported for this route. Supported methods: GET, HEAD, PUT, PATCH, DELETE."

Any help appreciated.

Thanks,
Kim

I have managed to get this working.
I believe the issue was my end with an error in the file extension.

Probably same issue as here:

https://akaunting.com/forum/discussion/general/unable-to-add-file-to-expenses

It appears attachments can currently only be .jpg, not .pdf. This is very inconvenient, as many invoices are sent as PDFs.

I am able to attach pdfs to an invoice but when it's sent out the attachments do not go through. How can I make sure the attachments are sent with the invoice?