PS 1.7 "The description field is invalid." Category> Description

[Bes992]

Hello,

I try to put the following into the source code of category> description, but always get the message: The description field is not valid. (see screenshots)
It's about the code:

<div id="oa_widget" class="widget-js"></div><script type="text/javascript" src="https://widget.onlineafspraken.nl/consumer/booking/book/key/kkme88usfv93-acdd80/at/0/st/0/ln/3/l/41122/t/a4/f/110d0111/c/025989,007bbf,111,0068a2,007bbf,fff,0,fff/s/550_1500/o/theme:advanced,dp:modern,interval:week/exclude/mobiledetect/output/js"></script>

 

I already use the same code in other categories, but I do not want to place it again.
What can this be? Hope someone can help me with this.

[NemoPS]

I don't think the field can accept javascript, you need to edit the core Category class if you want to do so

[Bes992]

59 minutes ago, NemoPS said:

I don't think the field can accept javascript, you need to edit the core Category class if you want to do so

If you go to the link bellow you can see I already did put the code one week ago inside the field and it works, but when I try it again it doesn't work..

Link working code:
https://lasermedical.nl/27-cursus-cryolipolyse