Sometimes Marketo email links may load with a white page that reads “no healthy upstream” on the top left – this is usually due to a Marketo outage. Unfortunately there is nothing you can do on your end to fix it – it has to be resolved by Marketo engineers.
Update 29 August 2024
Message from Marketo support – “We are aware of this issue, as other customers have reported similar problems. There is currently an ongoing outage, and our engineering team is working on it with the highest priority. I appreciate your patience and cooperation”
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