Clear cache and data: Go to your phone's settings, then to the Apps section. Find Instagram and tap on it. From there, select "Clear cache" and "Clear data." This will delete any stored information that may be causing the issue.
Uninstall and reinstall: Try uninstalling the Instagram app and then reinstalling it from the app store. This should refresh the app and may solve the issue.
Check for updates: Make sure that you have the latest version of the Instagram app installed. If there are any updates available, download and install them.
Reset your password: If none of the above solutions work, try resetting your Instagram password. This should prompt the app to ask you to save the new password.