trying a fix

src/js/gcode-viewer.js

@@ -1,8 +1,15 @@
 "use strict";
 
 const entityMap = {
-    "&": "&amp;", "<": "&lt;", ">": "&gt;", '"': "&quot;", "'": "&#39;",
+  "&": "&amp;",
-    "/": "&#x2F;", "`": "&#x60;", "=": "&#x3D;" };
+  "<": "&lt;",
+  ">": "&gt;",
+  '"': "&quot;",
+  "'": "&#39;",
+  "/": "&#x2F;",
+  "`": "&#x60;",
+  "=": "&#x3D;",
+};
 
 function escapeHTML(s) {
   return s.replace(/[&<>"'`=\\/]/g, function (c) {
@@ -17,7 +24,7 @@ module.exports = {
     return {
       empty: true,
       file: "",
-            line: -1
+      line: -1,
     };
   },
 
@@ -33,7 +40,7 @@ module.exports = {
     },
     "gcode-line": function (line) {
       this.update_line(line);
-        }
+    },
   },
 
   ready: function () {
@@ -42,7 +49,7 @@ module.exports = {
       scrollElem: this.$el.querySelector(".clusterize-scroll"),
       contentElem: this.$el.querySelector(".clusterize-content"),
       no_data_text: "GCode view...",
-            callbacks: { clusterChanged: this.highlight }
+      callbacks: { clusterChanged: this.highlight },
     });
   },
 
@@ -65,6 +72,9 @@ module.exports = {
       }
 
       const response = await fetch(`/api/file/${file}`, { cache: "no-cache" });
+      if (response.status == 400) {
+        return;
+      }
       const text = await response.text();
 
       if (text.length > 20e6) {
@@ -147,6 +157,6 @@ module.exports = {
       scroll.scrollTop = target * lineHeight;
 
       Vue.nextTick(this.highlight);
-        }
+    },
-    }
+  },
 };