fix(jupyter): fixed bug. Fixes: RCCE-26

rhodecode/lib/markup_renderer.py

@@ -541,9 +541,7 b' class MarkupRenderer(object):'
             captured_errors = {}
             # TODO: In the event of a newer jupyter notebook version, consider increasing the as_version parameter
             notebook = nbformat.reads(source, as_version=4, capture_validation_error=captured_errors)
-            try:
-                (body, resources) = as_html(notebook)
-            except AttributeError:
+        if captured_errors:
                 error_messages = '<br>'.join(str(error) for error in captured_errors.values())
                 body = f"""
                         <div style="text-align: center;">
@@ -551,6 +549,8 b' class MarkupRenderer(object):'
                             <p>{error_messages}</p>
                         </div>
                     """
+        else:
+            body, _ = as_html(notebook)
             return body