ID:208502 Unable to scan device chain. <Hardware not connected, Can't scan JTAG chain, Port in use, or Check the hardware setup.> Please use JTAG Chain Debugger to troubleshoot the JTAG chain.

CAUSE: An attempt to auto detect the JTAG chain failed. The Quartus Prime software is suggesting you to open the JTAG Chain Debugger to assist in isolating and resolving the failure.

ACTION: Click OK to close the message dialog box, then use JTAG Chain Debugger ti troubleshoot the JTAG chain.