Know How to fix Sage 1935 Install Error When Installing Sage 50. Sage 50 installation error 1935 mostly occurs when you are trying to install the assembly components in your system. You will see the following error message gets displayed in your screen, Error Message: 1935 cannot install the assembly component during installation of Sage 50 accounting software. If you want to know more, then call 1800-942-6705.