This rubber roof has numerous leaks. These leaks are occurring near a drain and also nearest section of the roof that is pushing up and possibly causing leaks. This rubber is possibly serviceable and can be maintained but it will have more leaks because there is a lot of standing water and rubber roofs or not as good and was standing water as TPO roof are.
There are two possible ways to repair this roof one is to coat the area where the leaks are occurring and repair the raised section of roof and the roof drain.
The second way to repair this roof is to add a TPO membrane over the top of the existing roof and make the same repairs to the drain and to the raised roof sections.