Spanning Tree Protocol on Canopy 5400?

Hello. Do Canopy 5400 series products support Spanning Tree Protocol (STP)? Does CMM Micro 1070CK support that protocol? If yes, which are minimum sw/hw versions that support it?

Our customer has a network composed of a number of 5400SM, 5400AP, 5400BH and CMM Micro 1070CK devices. He wants to connect two of the locations with an additional optical link while keeping the WiFi network. But when he connects the optical link, looks like he creates a loop.

Thanks and best regards.