diff --git a/packages/mermaid/src/rendering-util/rendering-elements/createLabel.js b/packages/mermaid/src/rendering-util/rendering-elements/createLabel.js
index de6f0403d..012d4fb2d 100644
--- a/packages/mermaid/src/rendering-util/rendering-elements/createLabel.js
+++ b/packages/mermaid/src/rendering-util/rendering-elements/createLabel.js
@@ -81,7 +81,7 @@ const createLabel = async (_vertexText, style, isTitle, isNode) => {
     return vertexNode;
   } else {
     const svgLabel = document.createElementNS('http://www.w3.org/2000/svg', 'text');
-    svgLabel.setAttribute('style', style.replace('color:', 'fill:'));
+    svgLabel.setAttribute('style', style ? style.replace('color:', 'fill:') : '');
     let rows = [];
     if (typeof vertexText === 'string') {
       rows = vertexText.split(/\\n|\n|<br\s*\/?>/gi);
diff --git a/packages/mermaid/src/rendering-util/rendering-elements/shapes/erBox.ts b/packages/mermaid/src/rendering-util/rendering-elements/shapes/erBox.ts
index 9dd4c90e2..7e5557490 100644
--- a/packages/mermaid/src/rendering-util/rendering-elements/shapes/erBox.ts
+++ b/packages/mermaid/src/rendering-util/rendering-elements/shapes/erBox.ts
@@ -62,9 +62,12 @@ export async function erBox<T extends SVGGraphicsElement>(parent: D3Selection<T>
 
     // drawRect doesn't center non-htmlLabels correctly as of now, so translate label
     if (!evaluate(config.htmlLabels)) {
-      const textElement = shapeSvg.select('text');
-      const bbox = (textElement.node() as SVGTextElement)?.getBBox();
-      textElement.attr('transform', `translate(${-bbox.width / 2}, 0)`);
+      const textElement = shapeSvg.select('.label text');
+      const textNode = textElement.node() as SVGTextElement;
+      if (textNode) {
+        const bbox = textNode.getBBox();
+        textElement.attr('transform', `translate(${-bbox.width / 2}, 0)`);
+      }
     }
     return shapeSvg;
   }