Hi Calendly Support,I’m having trouble connecting Calendly to my Salesforce sandbox org.Here is what I’ve checked so far: I have System Admin access in Salesforce. The required Calendly permission sets are assigned to my user. The Calendly package is installed (v2.6). I tried connecting from an Incognito/private browser window, but it didn't help. This issue started right after our sandbox was upgraded to the Salesforce Winter '27 release.I’ve attached a screenshot of the error message for reference. Could you please take a look and advise on how to resolve this?Thanks!

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Question

Salesforce sandbox integration issue

Hi Calendly Support,

I’m having trouble connecting Calendly to my Salesforce sandbox org.

Here is what I’ve checked so far:

I have System Admin access in Salesforce.
The required Calendly permission sets are assigned to my user.
The Calendly package is installed (v2.6).
I tried connecting from an Incognito/private browser window, but it didn't help.

This issue started right after our sandbox was upgraded to the Salesforce Winter '27 release.

I’ve attached a screenshot of the error message for reference. Could you please take a look and advise on how to resolve this?

Thanks!