Can you please post a URL where I can log in to check the settings? I have tried the wp-login.php and the wp-admin pages, but they seem to be disabled.
Excluding all other categories should not be neccessary in this case. If the categories are enabled for pages, then it should work. Also, make sure to check this section of the documentation: Include by categories or Terms
(If you don’t want to see posts that are not categorized in any way, then there is one option you need to turn off as well, that is explain there as well)
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