cURL Error 60 when connecting to identity.xero.com

[myworks-peter]

SDK you're using (please complete the following information):

• Version 2.21

Describe the bug
Beginning at 2023-07-21 03:28:22; we're now getting an error on our end when connecting to Xero using this library, which seems to indicate an SSL issue on Xero's end?

[2023-07-21 03:28:22] local.ERROR: cURL error 60: SSL: no alternative certificate subject name matches target host name 'identity.xero.com' (see https://curl.haxx.se/libcurl/c/libcurl-errors.html) for https://identity.xero.com/connect/token {"exception":"[object] (GuzzleHttp\\Exception\\RequestException(code: 0): cURL error 60: SSL: no alternative certificate subject name matches target host name 'identity.xero.com' (see https://curl.haxx.se/libcurl/c/libcurl-errors.html) for https://identity.xero.com/connect/token at

To Reproduce
Steps to reproduce the behavior:

1. Connect to Xero or update a refresh token as normal using this library

Expected behavior
A successful connection to Xero.

Additional context
This seems quite odd to us, as nothing seems to have changed / we're not seeing any updates/status messages about this on Xero's end. We're still investigating this further to find more information on our end, but due to the above error message, we're reaching out here. It seems that there's a recently updated SSL certificate on *.xero.com, which may be a possible factor here?

[github-actions]

PETOSS-317

[github-actions]

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