What does the error “Trading is blocked in (instrument) for this session as you are a designated person of the company” mean?

During the “No trading window period,” designated persons of TradeJini, those expected to have unpublished price-sensitive information (UPSI), are restricted from trading any securities, including exiting existing positions. This measure is in accordance with regulations (PDF) to prevent the misuse of sensitive information. It’s important to note that all open positions must be exited before the trading window closes. The specific duration of this period will be communicated by the company to designated persons and will also be available on TradeJini’s website.