Adding Member using admin api with nextjs 14 app router

Fill out the following bug report template with as much detail as possible!
I am getting error:

TypeError: invalid ‘instanceof’ operand KeyObject

My ghost-client.js code:

export function addMember(email) {
return admin.members.add(
{ email },
{ send_email: true, email_type: ‘subscribe’ });

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Issue Summary

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Setup information

Ghost Version

Node.js Version

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Self Hosted

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