210922 fix1

backstage/static/js/yo.js

@@ -670,7 +670,7 @@ function GenProductSection(mimg, specimg) {
                 + '"\n  layout="responsive">\n</amp-img>';
         }
     }
-    tmpstr = tmpstr.replaceAll('##AMP-IMG##', mimgstr);
+    tmpstr = tmpstr.replaceAll('##AMP-IMG##', mimgstr == "" ? "&nbsp;" : mimgstr);
 
     previmgstr = "";
     for (i = 0; i < mimg.blocks.length; i++) {
@@ -688,7 +688,7 @@ function GenProductSection(mimg, specimg) {
           </button>`;
         }
     }
-    tmpstr = tmpstr.replaceAll('##PREV-IMG##', previmgstr);
+    tmpstr = tmpstr.replaceAll('##PREV-IMG##', previmgstr == "" ? "&nbsp;" : previmgstr);
 
     specimgstr = "";
     for (i = 0; i < specimg.blocks.length; i++) {