to get past this... Simply add a space to end of each field and then delete it and then it will recognize whats filled in the box. You then will be able to click the Submit button. I use this technique everyday and it works every time.
FULL EXPLANATION & EXAMPLE...
The field is programmed to look for keyboard interactions, When lastpass fills it in there is no keyboard interactions so it does not recognize what has been filled in or even pasted in by mouse. So like I stated above..
Let Lastpass fill in the fields then on the first field and click after the last dot and follow these key strokes..
1. Follow step above
2. (Company ID)hit space bar, delete key, tab key to go to next field
3. (User ID) hit right arrow to get to last character of whats filed in, hit space bar, delete key, tab key to go to next field
4. (Password ) hit right arrow to get to last character of whats filed in, hit space bar, delete key
5. Then you will see the Sign on Button become clickable and will allow you to login.