Thanks @swenhelge ,
The problem is actually reported by one of our users. And yes they have access only to the Try-Me (the one integrated with the broker). While I from the administration side have access to both.
And for the same reason codepen is not really useful from them as the brokers can only be connected from websocket using ‘solace-cloud-client’ credentials.
Most likely this (enable text option on broker integrated try-me) could be raised as an enhancement with Solace Cloud as all of our users have similar access ?