We installed SDL Tridion Sites 9.1 on Azure VM using Microsoft Azure SQL database 12.0. initially, we were getting "The SQL Server edition of the target server is unsupported, e.g. SQL Azure." which was fixed after updating signalrBackplaneHub element in Tridion config file
<signalrBackplaneHub messageBusType="Microsoft.AspNet.SignalR.ServiceBus.ServiceBusMessageBus" scaleoutConfigurationType="Microsoft.AspNet.SignalR.ServiceBusScaleoutConfiguration" assembly="Microsoft.AspNet.SignalR.ServiceBus3, Version=2.4.1.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35">
<backplaneConnectionParameters>
<add parameter="Endpoint=Endpoint"/>
<add parameter="topicPrefix"/>
</backplaneConnectionParameters>
</signalrBackplaneHub>
After restarting we are getting below error now. what could be missing
Error: No transport could be initialized successfully. Try specifying a different transport or none at all for auto initialization.