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"Attempt to read property "slug" on null" Problem



New Member
I overtook this 10 year old website 2 years back, removed malware, restored it and now I am permanent maintainer of it. However I can't fix this one problem. Website's wp-admin is pretty slow and I can't get my head over this problem of "Attempt to read property "slug" on null" Can anyone help me figure this out? All the menu items are correct and theme is OceanWP.

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