I'm having problems with SP Page Builder (latest version) modules. I keep getting this error message:

Error Save failed with the following error: The content exceeds allowed limits

What limit is this? Is it a limit on number of row or number of addons?

The particular module I'm working on now has 22 rows (plus a couple nested rows) and 56 addons. Is this too much? What are the exact limits?

I cannot find anything about limits when searching the documentation. Please advise.