Not repsonding to !followage

Im getting a error Nightbot : Error Connecting To Remote Server!

This is when im trying to do !followage

$(customapi https://api.rtainc.co/twitch/channels/DGBTS/followers/$(user)?format=[1]+has+been+following+[0]+for+[2])!

Can anyone tell me whats wrong? All the other commands are working besides this one

The API author is no longer updating it, so it brokeā€¦

Use this instead: !howlong has suddenly stop working!