I have done all the steps and when I go to fill in the information the error message does not show up.
The blank still accepts a value more than 100.

But this is how when I fill in information it doesn't show that there is an error.

Sorry you're stuck but there's almost always a pretty easy fix! Do NOT try to start all over again, uninstall Max's Pitch Package, etc. That can make it worse. There's a 95% chance the same snag/fix is listed & answered in the Help FAQ. But if you can't find it there, post your problem here.
Make sure you post in the right category below & be sure to include a screencap showing the issue!
Ok, do these steps so I can access your account and check, ok?
Log in and click on the character icon (upper right) and click My Settings
Click My Personal Information (upper left) and then Grant Account Login Access below that
On the row for The Max Labs Project Support, use the --No Access-- pull-down menu to select 1 month and click Save
Then I will need your Salesforce Org ID so I can find your account:
Click the little gear at the top right and then select Setup.
On the lefthand menu go to Company Settings and under that, click Company Information.
In the middle panel, look down in the left column for Salesforce.com Organization ID and copy/paste that long string of numbers & letters and email it to me at tim.hill@themaxlabsproject.com
Well, you have to click Save for the error to show up. Have you been doing that and still not getting the error message?
yes I have been saving it and still wouldn't work
Glad we got it going for you!