For all user who have faced IFTTT issue , please follow the procedure below step by step to get it resolved.
As IFTTT has changed the way devices can access / trigger event on their maker channel the firmware on bolt needed to updated to meet the same requirements.
1) Update your bolt even if you have done so previously.
Note: Please do so after 6 PM on 4/10/2016 as the latest firmware will be updated to our cloud by then.
1.a) Update Steps:
i) Make sure your bolt is connected to a WiFi with a good internet speed.
ii) Go to your bolt_ip_address/settings page.
iii) Click on the Update button present on this page.
iv) Wait for a minimun of 3 minutes for the update to complete.
2) Earlier we copied https://maker.ifttt.com/trigger/event_name/with/key/event_key to the API.txt file IFTTT_key value
Now we only have to copy /trigger/event_name/with/key/event_key to the API.txt file IFTTT_key value
Where event_name is the even name given on ifttt when making the recipe and
event_key is the unique key generated by ifttt for your recipe.