Step 1. Open console using /console in chat and pressing enter or pressing F9 or F10 on your keyboard. A UI like below should show up for you.
CLICK SERVER TOP RIGHT
Step 2. Make sure to click server in the top right of your screen, you need server not client view.
Step 3. Search for SIMS and see what comes up.
Step 4. Use your common sense and if anything is red and you think you can fix it, fix it. If you can't fix the error and still need support please create a ticket and attach the screenshot.