This isn't unusual to see. We encounter this issue on a daily basis across multiple Search Ads accounts.
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Same thing here, expecially on the BASIC version. Just a white screen. Refreshing does not help. Siging out and in does not help. Nothing helps.
Sometimes going to "Advanced" first helps. But this requires knowing the URL for the advanced version, because the screen is white and there is no link visible.
It is HORRIBLE that Apple has S * H * I * T * like this in production.
(And yes, I am using the latest Safari on the latest macOS.)
Yeah I'm currently getting this across both Basic and Advanced. Tried different browsers, computers, networks etc but can't get anything to work.