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Error - Custom Setting Name too long: https://testtimemachine-test.chargebee.com/.chargebee.com
Set up a remote site to allow-list
While integrating your Salesforce sandbox instance to your Chargebee test site, you may experience the error “Custom Setting Name too long:” while adding the Chargebee domain ID.
For Sandbox sites, assuming the URL is https://acme-test.chargebee.com, enter only the subdomain value as acme-test
Please refer here for more details.
Note: 1) For Production sites, enter the complete URL. For example, https://acme.chargebee.com
2) It is necessary to set up a remote site to allow-list your Chargebee site in Salesforce
Search for Remote Site Settings in the Quick Find box and click New Remote Site.
Add the URL of your Chargebee's site. (Example: https://acme-test.chargebee.com)