I’ve been using IFTTT applets trigger by virtual switches for several years. I’ve even had a Pro account since they announced the change a couple years ago.
Yesterday, with no warning, IFTTT turned off two of my applets triggered by SmartThings. Further, if I try to configure the trigger on those applets, I can’t modify the SmartThings attributes. And if I try to create a new applet, SmartThings is no longer available as a trigger.
Since ST shut down groovy smartapps 2 weeks ago, there have been on-going issues between IFTTT and ST. IFTTT is aware and working on resolving any issues with the integration. There is an existing thread: