Help debugging Nucleo board using official STM32 Cube IDE.

I am unable to debug a simple blinky program created using the CubeMX software. The board I am using is a Nucleo F103RB board. The IDE seems to be able to flash the MCU but then I get a

ST-LINK SN : 0670FF363732594D43214619
ST-LINK FW : V2J34M25
Voltage : 3.26V
SWD freq : 4000 KHz
Connect mode: Under Reset
Reset mode : Hardware reset
Device ID : 0x410
Device name : STM32F101/F102/F103 Medium-density
Flash size : 128 KBytes
Device type : MCU
Device CPU : Cortex-M3
 
 
 
Memory Programming ...
Opening and parsing file: ST-LINK_GDB_server_a01408.srec
 File : ST-LINK_GDB_server_a01408.srec
 Size : 96 Bytes
 Address : 0x08000000 
 
 
Erasing memory corresponding to segment 0:
Erasing internal memory sector 0
Download in Progress:
 
 
File download complete
Time elapsed during download operation: 00:00:00.477
 
 
 
Verifying ...
 
 
 
 
Download verified successfully 
 
 
Error! Failed to read target status 
Debugger connection lost.
Shutting down...
 

followed by this:

No source available for "(gdb[13].proc[42000].threadGroup[i1],gdb[13].proc[42000].OSthread[1]).thread[1].frame[0]" 

The same project debugs fine using the TrueStudio IDE.