In WP 6.7, the admin Fields tab does not save changes in the table view (it does in the individual field view). Clicking the “apply” button for saving changes appears to not work.
I was able to track this down to a specific change in the WP List Table object class in version 6.7.
I will be working on a more “official” fix for this and including it in the plugin. However, until then, there is a patch available. You can replace the file wp-members/includes/admin/tabs/class-wp-members-admin-tab-fields.php with the version at the gist below:
https://gist.github.com/rocketgeek/2bb08a8649cf1f273c6354b12ed93e1a
More specific info on the bug
The plugin uses the WP List Table object class (as do many plugins) to build the tables it displays such as in the Fields tab. The change in WP 6.7 makes a change to the bulk actions “Apply” button, which is something that is hard-coded in the object (cannot be filtered) and there is a change in the core WP admin JavaScript that does not allow the button to submit until an item is selected.
The problem for WP-Members is that it doesn’t use the “cb” checkbox (the unlabeled column of checkboxes in the first/leftmost column) to identify the rows to save. That checkbox is only used for deletion. WP seems to have made this change to prevent the button from submitting if no rows are selected in the Posts > All Posts screen. But this change causes a problem for the WP-Members Fields tab.
For now, I recommend applying the patch listed at the gist link above. This will work fine, and it may end up being the “official” change. However, I am working to learn more about the change and am working to determine what the best possible fix is. Regardless, you will only need to apply the patch to the current version (3.4.9.x) as any “official” fix will be incorporated into whatever the next production release is (currently slated to be 3.5.0 by the end of this month).
If you discover any additional information regarding this issue, please notify me via the support contact page.