JS Error after updating to 9.3 (Subtract from Variable)

I did exactly the same and created a new course with only one page, two textboxes, one action group with four actions and one button. In the Lectora preview it runs fluently but after publishing to html I got exactly the same error. Same accurs on the other PC with 9.3.


I also tried to rebuild the action which doesnt help aswell.


We use the substract action for pagenumbering. Since our table of content is within the training chapter we substract 1 from the total of pages (PagesInChapter) to get the right total page number.


My guess is that there is an error with the script output while publishing. I also thought it could be only a problem with my installation but I have ot on 2 PCs now which I recently updated. Does it help if I upload the html output of the course?

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