We can't find the user named 'Ada Balewa' with the profile 'Custom: Support Profile'. How do I resolve this?

I created a new playground, followed all the steps multiple times, and I'm still getting the same error. I made sure Ada does exist and the account is active. So why am I getting this error and how do I fix it?

We can't find the user named 'Ada Balewa' with the profile 'Custom: Support Profile'.

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