How do you debug whether an error is due to your account, the app, or the community?

A systematic process of elimination is the most reliable way to diagnose Reddit posting problems. Start by testing the simplest variable first: switch between the official Reddit app, the mobile website, and the desktop website to see whether the behavior changes. If the problem disappears on one interface but persists on another, the issue is almost certainly client-side rather than account-level. Browser extensions, cached data, or bugs in a third-party app can all cause submission errors, rate-limit messages, or silent failures that have nothing to do with your account standing. Next, test across different communities. If you can post in one subreddit but not another, the restriction is community-specific rather than a sitewide account limitation. Visit the community's description, rules page, and any pinned posts to see whether recent moderator announcements explain the behavior. You can also try posting in a subreddit you control or in a low-restriction community like r/test to confirm your account can actually submit content. If submissions work elsewhere but fail in one particular community, you may be hitting an AutoModerator filter or a moderator ban, and sending a polite modmail to that community's moderators is the appropriate next step. If the problem appears sitewide — no comments or posts go through anywhere — the issue is either your account or Reddit's infrastructure. Check Reddit's official status page at redditstatus.com for any active incidents. If the platform shows no problems, visit your account profile while logged out or in an incognito window. If your profile shows a "user not found" message, the account may be shadowbanned or suspended. You can also visit reddit.com/appeals to check whether your account has any active flags that allow for an appeal. Documenting the exact error messages, timestamps, and which interfaces you tested will make any subsequent report to Reddit much clearer and easier for admins to investigate.