I've tried to use the image but it works for me, could you share a workspace with the replicated problem?
https://playground.jsreport.net/w/anon/K6COeK7T

Thank you, I've put it in the backlog and we will implement it.
https://github.com/jsreport/jsreport/issues/917

Do you have any other suggestions?

You likely use the moment library in one of your helpers.
There is a different version of moment in jsreport 2.11.0 that logs this warning.
You need to check how you construct moment date, based on the error.

Does anyone know of an alternate solution to this?

Unfortunately, the handlebars need to hold results in the memory so you can't generate CSV bigger than ~500mb this way. We have a solution we want to implement mentioned here:
https://github.com/jsreport/jsreport/issues/839

Is it possible to stream the report to S3 rather than build the entire thing in memory?

You could make the template "empty" and not use the handlebars to concatenate the csv. Instead, you implement the afterRender script. This script would "batch loop" your data, create csv text lines and stream the result to the s3 using aws s3 nodejs SDK.

Would an XLSX file work any better?

Yes, the xlsxAdd helper batches the XML into files which are later streamed and compressed to the xlsx. So the memory consumption there is better.

If you email me the pdf output that is causing this warning, I should be able to find out the reason.

If you check the logs more in detail, you will be able to find the template which caused it.
There is typically a line like this

2022-05-12T09:34:22.130Z - info: Rendering template { name: excel, recipe: xlsx, engine: handlebars, preview: false }

Followed by other logs from the particular rendering and then there will be also your warning. Note it is really just a warning, not an error, and you typically won't recognize the different output.

jsreporonline tiers FREE - BRONZE - SILVER - GOLD each has some credits monthly limit.
Every credit is 1s jsreportonline used to render it.
You can see how much credit is spent for a particular template if you run it in debug and observe the output.
jsreportonline doesn't store outputs or input data. Only if you explicitly ask to through the reports extension
https://jsreport.net/learn/reports

Please email me to jan.blaha@jsreport.net a minimal jsreport export that replicates this warning. I would check where the error comes from. Thank you

Did you try using css to make it landscape? Maybe the javascript will calculate height properly then.

@page {
  size: landscape;
}

The xlsx recipe can remove a cell like this
https://playground.jsreport.net/w/anon/3x0JT_HC