ContributionsMost RecentMost LikesSolutionsRe: Cannot login: Script Error - "Unable to get property 'prototype' of undefined or null reference" Just phoned MYOB - only 22 minutes to get through. They tried to be very helpful, but just giving the same steps as above. They wanted me to add MYOB to my trusted sites, however, why can I successfully login using a different user name. but my email address login that has worked every day for 15 years suddenly has a problem? I wasn't convinced, so I phoned my IT service provider (external). They have been inundated with clients having this problem today. He took over my computer and changed my password (which I had already done and it didn't help). But he also selected Download History and Form Data on the Delete Browsing History step. This time it worked and I am logged in. However, he warned me not to log out today in case it happens again. MYOB have big problems. Good luck everyone. Re: Cannot login: Script Error - "Unable to get property 'prototype' of undefined or null reference" MYOB have the worst customer service. I am still getting the Script Error and think I might have to try phoning them, but unfortunately past experience for me is being on hold for over 2 hours before I even get to speak to anyone. Then getting transferred around and finally they hang up. Must be their business model now - if in doubt, hang up. They used to have wonderful tech support, but no longer. Re: Cannot login: Script Error - "Unable to get property 'prototype' of undefined or null reference" I get the Script Error at the login screen when I click Next. However, if I change the email address to something else and click next it takes me to the next screen wanting a password!! Weird. Re: ERROR: Unable to get property 'prototype' of undefined or null reference I am also having this problem today with Script Errors. I have cleared my cache, deleted temporary files, and deleted the contents of the file in General Internet Options as recommended in other posts. I need to process my payroll today. Is this happening because MYOB are changing the login screens? How can MYOB help me today? Re: Cannot login: Script Error - "Unable to get property 'prototype' of undefined or null reference" I am having the same issue with these Script Errors. I have done all the suggested steps. Cleared cache, deleted temporary files and deleted contents of the file in General Internet Options. Is it because MYOB are updating the login pages? I need to process payroll today. How can MYOB help me?