Both Websites do not have an Alt Text in the SPPB page SEO settings, but the missing Open Graph Image. Adding an image fixed the error message. If i try to add now an Alt Text in the SEO settings, the Open Graph Image gets deleted. From my point of view, something is wrong there. Everywhere else in SPPB i can add an Image AND an Alt Text.
There may be an issue in that version. Please check if it is resolved in the latest version.
I don't understand, why an Open Graph Image (Open Graph is only for Social Media) is mandatory if i want a meta description and keyword list for my SPPB pages, which in turn is used in browsers?
The SP Page Builder SEO field is more powerful than Joomla’s core SEO settings. If Joomla’s field is good enough for you, then you can use it. There is no mandatory requirement to use SP Page Builder’s SEO fields.
A few weeks ago i asked in the Joomshaper Website Chat, if i also should add the meta description and keyword list in every SPPB page, when i already did this in all menu entries (Menu -> Main Menu -> "Menu entry name" -> Metadata -> Meta Description). A Supporter answered me by Mail, yes thats better for SEO if i add meta description and a keyword list also in every SPPB page. You wrote me now, "The other fields are not necessary in this case".
If Joomla’s metadata settings fulfill your requirements, then using SP Page Builder’s metadata is not mandatory. These are not required fields, and the page can function without them.