Problem with download “Standard Peripheral Library”
I too was facing the same problem. So I downloaded the required std peripheral firmware from st.com. The file will be a zip file. I extracted it and pasted both the zip and extracted files in firmwares folder. It worked.
I placed it here---> ( C:\Users\nishith\AppData\Roaming\Ac6\SW4STM32\firmwares ). It won't work if you don't put the zip file. Remember to paste the zip file also.