Symptoms
Attempt to set Control Panel URL in Home > Products > Online Store > Branding fails with error message:
Error: The URL 'https://url' is not valid. You should specify the valid URL for 'Control Panel URL'.
even though the url is valid.
Cause
The error message is caused by the incorrect url validation due to the bug #PBA-82094 ("Control Panel URL does not accept some tlds"), tld with the number of symbols more than 6 are not accepted.
Resolution
Please contact Odin Technical Support if you need to setup url with tld > 6 symbols.