It does not work below 15 mins, the indicator is a daily pivot indicator and you need to zoom out to see the pivot level lines, I could not identify any bugs with the indicator, it works from 15 mins to 1 month, please let me know what bugs you have found and I will investigate. You should still be within your 14-day refund period if you wish to return the product.
You may find the following indicator more suitable, there are no Telegram alerts but should show pivot levels for different timeframes, we are working on a fix now after the recent cTrader update caused it to stop working.
https://clickalgo.com/pivot-point