Sp page builder doesn't save

Hello

Apologies for the inconvenience.

Could you kindly take a moment to check out the following documentation links below?

These are helpful:

https://www.joomshaper.com/documentation/sp-page-builder/sp-page-builder-3/faq-problems-solutions#i-cannot-edit-pages-from-front-end

https://www.joomshaper.com/documentation/sp-page-builder/sp-page-builder-3/troubleshooting#frontpage-editor-not-working-possible-solution

https://www.joomshaper.com/documentation/sp-page-builder/sp-page-builder-3/troubleshooting#i-cannot-load-page-templates-and-or-sections-library-or-use-front-end-editor-span-class-h4-br-span

Also, kindly recheck the technical requirements and PHP settings from the link below as well:

https://www.joomshaper.com/documentation/sp-page-builder/sp-page-builder-3/basic-information-requirements

Please do let me know if the issue still persists.