Hey @Adarsha ,
This appears to be the same issue as was noted here:
It results from you having some security restrictions on your machine that prevent you from running powershell files.
NREL is working to address the issue once and for all with the next URBANopt release but, in the meantime, your only options are to either figure out what is blocking powershell files from running on your system and unblock it OR you could use the LBT 1.8 stable release that used URBANopt 0.11.1 as you see in the compatibility matrix. URBANopt 0.11.1 is from before when URBANopt started using powershell files.