More explicit error message when Field Suggestion is (partially) disabled

README.md

@@ -65,7 +65,7 @@ LOG_LEVEL=`INFO` # A string level for logging.
 
 > Due to time constraints @nikitastupin won't be able to answer all the issues for some time but he'll do his best to review & merge PRs
 
-In case of question or issue with clairvoyance please refer to [wiki](https://github.com/nikitastupin/clairvoyance/wiki) or [issues](https://github.com/nikitastupin/clairvoyance/issues). If this doesn't solve your problem feel free to open a [new issue](https://github.com/nikitastupin/clairvoyance/issues/new).
+In case of questions or issues with Clairvoyance please refer to [wiki](https://github.com/nikitastupin/clairvoyance/wiki) or [issues](https://github.com/nikitastupin/clairvoyance/issues). If this doesn't solve your problem feel free to open a [new issue](https://github.com/nikitastupin/clairvoyance/issues/new).
 
 ## Contributing
 

clairvoyance/oracle.py

@@ -422,7 +422,8 @@ async def __probation(document: str) -> Optional[graphql.TypeRef]:
 
     if not typeref and context != FuzzingContext.ARGUMENT:
         try:
-            raise Exception(f'Unable to get TypeRef for {documents} in context {context}')
+            raise Exception(f"""Unable to get TypeRef for {documents} in context {context}.
+                            It is very likely that Field Suggestion is not fully enabled on this endpoint.""")
         except Exception as e:
             raise Exception(e) from e
 
@@ -467,8 +468,9 @@ async def probe_typename(input_document: str) -> str:
 
     response = await client().post(document=document)
     if 'errors' not in response:
-        log().debug(f'Unable to get typename from {document}')
-        sys.exit(1)
+        log().warning(f"""Unable to get typename from {document}.
+                      Field Suggestion might not be enabled on this endpoint. Using default "Query""")
+        return 'Query'
 
     errors = response['errors']
 
@@ -482,7 +484,9 @@ async def probe_typename(input_document: str) -> str:
             break
 
     if not match:
-        log().debug(f'Unkwon error in `probe_typename`: "{errors}" does not match any known regexes.')
+        log().debug(f"""Unkwon error in `probe_typename`: "{errors}" does not match any known regexes.
+                    Field Suggestion might not be enabled on this endpoint. Using default "Query""")
+        return 'Query'
 
     return (match.group('typename').replace('[', '').replace(']', '').replace('!', ''))
 
@@ -555,6 +559,9 @@ async def clairvoyance(
     input_document: str,
     input_schema: Dict[str, Any] = None,
 ) -> str:
+
+    log().debug(f'input_document = {input_document}')
+
     if not input_schema:
         root_typenames = await fetch_root_typenames()
         schema = graphql.Schema(