Instagram Disabled My Account Without Explaining the Violation

I had been using my Instagram account for about 3–4 years without any problems, and recently it was suddenly disabled. On the screen I only see a warning that my account has been disabled, but I was not given any clear and detailed explanation about which rule I supposedly violated or why this action was taken. Since this account is important to me and has been active for years, I kindly request that my account be reviewed in detail and reactivated as soon as possible if there is no serious or intentional violation. If there has been any misunderstanding or automatic error, I ask that it be corrected and that I be informed clearly about the reason for the disabling.