While trying to open the Electrical catalogs in AECOsim Building Designer, the electrical symbols do not appear in the catalogs. Also, Load Electrical tools are not working properly.
From the picture above, it looks like you have chosen the delivered MicroStation project called "MetroStation", which does not include the required data to properly support AECOsim Building Designer. Instead, you will need to choose one of the AECOsim Building Designer projects such as "BuildingTemplate_NM" or "BuildingTemplate_US".