Let's get rid of the script error and keep using QuickBooks when in Multi-user mode, screwyoukwikbuks.

I can see that your QuickBooks company file is auto-updated. Keeping your file up-to-date is very important. However, you also need to check if both the client and server computer meets the system requirements to run the software.

For the script error, it occurs when there's an issue from a third-party app interacting with QBDT. Check out the table in this link to fix the issue depending on the error: Script error when using payments account applications or websites.

Also, need to make sure that your Database Server Manager is properly set up. This is the tool that allows users to access the company data. Please check this article about QuickBooks Database Server Manager and let's perform all the steps provided.

I've also added an article that'll help you learn the task you can perform when switched to single or multi-user mode: Features available and tasks you can perform in single or multi-user mode.

Stay in touch with on how everything goes, @screwyoukwikbuks. I'll be around to help.