update err msg

README.md

@@ -203,6 +203,9 @@ Since v1.5.5, we've already optimized the SHA256 function to the top. So the onl
 
 
 # Change Log
+## v1.5.6
+* update error msg when can not connect to civitai API service
+
 ## v1.5.5
 * update SHA256 function, now it just use the code from pip
 

scripts/lib/model_action_civitai.py

@@ -207,6 +207,10 @@ def get_model_info_by_url(model_url_or_id:str) -> tuple:
         return    
 
     model_info = civitai.get_model_info_by_id(model_id)
+    if model_info is None:
+        util.printD("Connect to Civitai API service failed. Wait a while and try again")
+        return
+    
     if not model_info:
         util.printD("failed to get model info from url or id")
         return