Custom INSTRUCTIONS (not content) for installing content is not showing up on pages of the site where a custom approach is needed. Only a red space and in the middle a white bar where the instructions should be. Any thoughts?

Works fine for me on my own dashboard thread.  Can you screenshot what you see?

Well now I don't understand how to post a picture in here since it says something very awkward to me, but one problem at a time, so here's a link: http://leteckaposta.cz/260133553
the white bar doesn't react in any way

Sorry but I can't see that image.

You probably have paint or something on your pc. On the upper right on your keyboard you have a button called PrtSc or something. Short for Printscreen. Press it and ctrl+V in your paintprogram. Save the picture on your comp somewhere and upload here as an attachment in a post.

There might also be some online services you can use. It depends on your programs and knowledge. Do you sit in Czechia or something?

Yeah, I know how to printscreen. It just doesn't allow me to put the image here. There's only a bar that shows up and says "enter text to be formatted" and it doesn't open a window in which I can search the image on my comp, as it usually would. But that's not the problem.
Btw what do you mean by sit in Czechia? Yes, I'm czech, if that's what you were asking. And no, I'm pretty ok with computers. I've just never come across bugs like this.

Can you link to a post that is doing this? I've not been able to find a post that has the issue.

No, I was just curious. I'm european as well.

To attach an image on the "Reply to Thread" screen just scroll down till you see the Miscellaneous options section, and within that is an "Upload" button.  The IMG tag is for putting images inside a post that you have already uploaded.

Regarding this issue, I have not been able to replicate it even on my own uploads like this: https://www.modthesims.info/download.php?t=387006

@Tashiketh See these threads:
https://www.modthesims.info/d/47544...-dec-14-05.html
https://www.modthesims.info/d/22892...r-bodyshop.html
https://www.modthesims.info/d/29194...r-freetime.html
They're all having empty instructions.

Not any more! . Thanks for the reports and the investigation!  I've fixed this in the code, so it shouldn't occur again.  

Thank you so much for helping with this wonderful article.