Hi @Voodoo
Thank you for posting.
According to your description, you are getting 504 gateway timeout error while using ‘add a row into a table’.
I tested from my end and it works fine. I believe there is no related global incident existing now.

This could be a temporary issue especially it was working earlier. The 504 Gateway Timeout error is an HTTP status code that means that one server did not receive a timely response from another server that it was accessing while attempting to load the web page or fill another request by the browser.
Please establish a new connection to it and resubmit the request, then try it again.
If it doesn’t help, please help to copy the whole flow and try with the copied one.
Hope the content above may help you.
Best regards,
Anna