This happens because of the following reasons:

CSP directives present on brand website 

On the website, do Right Click → Inspect → Network. You might see some errors like these

​

​

These ‘Content Security Policies Directives’ issues arise because the current domains and/or other relevant URLs have not been whitelisted by the brand. Based on the environment on which the client is on, they will need to whitelist the corresponding URLs (Eg. prod/prod2/prod3); please reach out to your SM for more details.