How to fix H202 error in QuickBooks?

https://quicklybookonline.com/blog/quickbooks-error-h202-troubleshooting-guide/

The H202 error is one of the most common networking issues experienced by QuickBooks users who work in a multi-user environment. This error typically appears when a workstation tries to access a company file stored on another computer but cannot establish a proper connection. As a result, users may be unable to open the company file or switch to multi-user mode, interrupting daily accounting tasks. Although the H202 error may seem complicated, it is usually caused by network communication issues, incorrect hosting settings, firewall restrictions, or damaged network configuration files. Fortunately, these problems can often be resolved by following a systematic troubleshooting process.