I accessed your account and saw the error message and I think I know why you were lost. In the steps for fixing it that you pasted above, in Step 4 it says to scroll to the bottom to find Related Lists. I think you just didn't scroll down. When I'm in our account, I can just scroll down and find it and then you can follow the rest of the instruction on how to fix it to add Meeting ID back in on the left as show below:
I accessed your account and saw the error message and I think I know why you were lost. In the steps for fixing it that you pasted above, in Step 4 it says to scroll to the bottom to find Related Lists. I think you just didn't scroll down. When I'm in our account, I can just scroll down and find it and then you can follow the rest of the instruction on how to fix it to add Meeting ID back in on the left as show below:
Let me know, ok?