That's very odd; if it isn't loading it's either that it's blocked in Iran or my hosting provider is blocking the traffic since your location is based in Iran. Could you try accessing it via WiFi (VPN on and off) with airplane mode turned on or just having your data off? 

 I always use WiFi. I tried again but it's not working  

 With your data off as well? I haven't encountered the site not connecting at all before; will need to dig a bit further with this. 

 Yes.
I should say I use Tunnel as a VPN. It works well to others websites  

 From digging into it a bit more, it seems like my hosting provider may block Iranian access due to U.S. sanctions. VPNs should be able to get around this though; maybe Tunnel doesn't properly mask the origin, but I'm not entirely sure. 

 so bad 😞 
I use German and french servers. It works for others but for Shopstr doesn't