why x-face watchface is deleted from IQ Store

You have to ask the developer.  Maybe he/she just decided to stop supporting it.

i don't know who was developer and when click more from this developer: "server connection error" we're having problems talking to the garmin connect server.try again

Too Bad it is.... deleted? Discontinued? Abandoned? Banned? 

Seems strange there is not at least a note or something. Just an error page....

Best watchface ever, Clean and so many options.... Haven't found a replacement for FR945 yet. Hope there is something new for when I get my FR955 next month *g

I still use X-face. and can give you app file. put file in Garmin\ Apps when connect with computer. 
https://www.dropbox.com/s/o551thydzbi3uro/98GH0156.PRG?dl=0
H:\GARMIN\APPS\98GH0156.prg
https://www.dropbox.com/s/embgd3osfvmd1l0/98GH0156.STR?dl=0
H:\GARMIN\APPS\DATAQ\98GH0156.str
https://www.dropbox.com/s/y00z23rocy2h4jb/98GH0156.SET?dl=0
H:\GARMIN\APPS\SETTINGS\98GH0156.set

Thanks! I still have it running on my watch too, but I cant change the settings anymore. So these are the files for the watchface on your garmin? I cant seem to find them on my watch...

i also can't change setting when use garmin connect or garmin iq. these setting are my last setting. watchface picture on post with keyboard on background

That's a name for the prg that's assigned by the app store and it's not the same on different devices.

open file with notepad and use serch for word x-face.

Smart!! Thanks