New error message: "Cannot read properties of undefined (reading 'entitlements')"

[HarvardBioethics]

Lately I've been getting this error message while working on legacy emails: "Cannot read properties of undefined (reading 'entitlements')" and I don't know what it's referring to or what it means.

[William_A]

Hello @HarvardBioethics ,

Can you define what you mean by "legacy email?" Is this referring to the 3GE email builder - (with the big orange Continue button), or the 2GE builder that's only currently still available via the legacy Events tool?

Does this issue seem to be occurring while taking a particular action - editing a particular block type or adding a block into it?

Are you still able to save the email, and have those edits / saves reflect in your Previews and Test Sends? Are you able to move on to the scheduling page, or the error prevent this?

Are you utilizing any particularly specialized blocks, such as Read More, Donation, or Tables?

Does the error only seem to occur on specific browsers or devices you have access to, or on all of them?

If you're able, can you access the Dev Console of your browser (CTRL SHIFT C on PC, CMD SHIFT C on Mac), and get a screencap of any red lettered messaging, indicating the error codes? For example: