Let's fix this so that you can resume regular activities in QuickBooks Online, @Karth.
The error you've encountered may be due to data issues in your browser. Every time you visit a website, it saves some information from the web page in its cache and cookies.
However, this can sometimes cause behavioral issues in the program. To verify, you can open your account using a private browser as it ignores websites from using cookies and doesn’t record any history and data.
- Mozilla Firefox and Microsoft Edge: Press Ctrl + Shift + N
- Google Chrome: Press Ctrl + Shift + N
- Safari: Press Command + Shift + N
If you're able to create custom fields without errors, return to your regular browser and clear its cache and cookies to refresh website preferences that may be causing problems when using QuickBooks Online. Otherwise, you use a supported browser.
If the issue persists, I recommend reaching out to our QuickBooks Online Support team. They have the tools to securely access your account and investigate the reason for the suspension. If necessary, they can also escalate the matter for you.
Nevertheless, you can visit this artilce for future help, this can walk you through the details on how to manage your QuickBooks Online account seamlessly: Manage billing, payment, and subscription info in QuickBooks Online
Please know that I'm just post away if you need any further assistance about managing your subscription in QuickBooks Online. Don't hesitate to reach us out. Stay safe.