Index: openacs-4/packages/xowiki/tcl/package-procs.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/xowiki/tcl/package-procs.tcl,v
diff -u -r1.332.2.143 -r1.332.2.144
--- openacs-4/packages/xowiki/tcl/package-procs.tcl	29 Nov 2023 13:44:39 -0000	1.332.2.143
+++ openacs-4/packages/xowiki/tcl/package-procs.tcl	16 Jan 2024 17:35:16 -0000	1.332.2.144
@@ -1472,10 +1472,18 @@
             #
             # The exception was a real error
             #
+
             ad_log error "error during invocation of method $method errorMsg: $errorMsg, $::errorInfo"
-            return [:error_msg -status_code 500 \
-                        -template_file $error_template \
-                        "error during [ns_quotehtml $method]: <pre>[ns_quotehtml $errorMsg]</pre>"]
+
+            if {[ns_conn isconnected]} {
+              #
+              # When connected, also try to render the error to the
+              # user.
+              #
+              return [:error_msg -status_code 500 \
+                          -template_file $error_template \
+                          "error during [ns_quotehtml $method]: <pre>[ns_quotehtml $errorMsg]</pre>"]
+            }
           }
 
         } finally {