HiveMQ Cloud broker supports flexible MQTT clients permissions, however configuring those might become a challenge. Once you observe a failure, double-check that your permissions match the MQTT specification and contact HiveMQ Support.
\uD83D\uDCD8 Instructions
If the “Access Credentials” page displays any error to you, check the message to see, if it already contains the suggestion on how to fix your settings.
If the error displayed does not indicate a specific error, make a screenshot of the whole page and report it to HiveMQ Support, by following the instructions in the video: https://www.loom.com/share/877a00b3c07042c187d705fa17843eca?sid=2ccdc389-8c9e-4e4b-9deb-4c1ac601d2a8
If you cannot make a screenshot of the page with Access Credentials in your browser, you can record the browser activity in the HAR file. Refer to the following instructions: https://hivemq.atlassian.net/servicedesk/customer/portal/8/article/2616950808