**Fatal error** - Uncaught Error

Hi all
I have been using Rapidweaver for many years and have always been happy with it.
Last week I have created and published a blog with Alloy. In fact, it worked very easily. But suddenly Rapidweaver crashes and I get the following error message:

Fatal error : Uncaught Error: Call to undefined function curPageURL() in /private/var/folders/z8/7j2x0gsd5c99hgy1vf98907r0000gn/T/com.realmacsoftware.rapidweaver8/RapidWeaver/4929/document-0x7fdff42072e0/RWDocumentPagePreview/news/index.php:133 Stack trace: #0 /private/var/folders/z8/7j2x0gsd5c99hgy1vf98907r0000gn/T/AppTranslocation/E5D61D6A-59C7-44C6-BE47-FCA63AAA41E5/d/RapidWeaver 8.app/Contents/Resources/RWWebServerLaunch.php(175): include() #1 {main} thrown in /private/var/folders/z8/7j2x0gsd5c99hgy1vf98907r0000gn/T/com.realmacsoftware.rapidweaver8/RapidWeaver/4929/document-0x7fdff42072e0/RWDocumentPagePreview/news/index.php on line 133

After a restart of Rapidweaver the error message is now in the “Settings” under “Master Style”. Unfortunately I don’t understand a word of it.
I’m not even sure if the error is related to the new blog page.
Can anyone help me?

I am using version 8.5 (20821) - and have updated all stacks.

Many thanks to all who give me their time to look for a solution.