We attempted to make changes to one of our SP Page Builder pages (specifically editing some text content), but upon saving, we received the following error message:

"Request failed with status code 413"

After that:

We updated SP Page Builder to the latest version (July 17, 2025). We tried saving the changes again – the error still occurred. We increased all relevant server limits to their maximum values – the issue persists. It seems the problem may be related to SP Page Builder's request handling logic or the size of the request itself, which appears to exceed acceptable limits even with maximum server configurations.

Could you please advise us Thank you in advance for your help and a prompt response.