Created a method to clear nonce placeholders.

Author: patel-vansh

system/HTTP/ContentSecurityPolicy.php

@@ -1052,4 +1052,9 @@ public function clearDirective(string $directive): void
 
         $this->{$this->directives[$directive]} = [];
     }
+
+    public function clearNoncePlaceholders(string $text): string
+    {
+        return str_replace([$this->styleNonceTag, $this->scriptNonceTag], '', $text);
+    }
 }

system/HTTP/ResponseTrait.php

@@ -370,7 +370,7 @@ public function send()
         if ($this->CSP->enabled()) {
             $this->CSP->finalize($this);
         } else {
-            $this->body = str_replace(['{csp-style-nonce}', '{csp-script-nonce}'], '', $this->body ?? '');
+            $this->body = $this->CSP->clearNoncePlaceholders($this->body);
         }
 
         $this->sendHeaders();