I found the following messages:

Failed to load resource: the server responded with a status of 404 (Not Found)
JQMIGRATE: Migrate is installed, version 3.3.2
DevTools failed to load source map: Could not load content for http://localhost/tmp/assets/5bf266fe/pjax.js.map: HTTP error: status code 404, net::ERR_HTTP_RESPONSE_CODE_FAILURE
 

What happens when you try the demo survey - github.com/tpartner/LimeSurvey-Image-Int...ints_of_Interest.lss

It gives the same errors:

Failed to load resource: the server responded with a status of 404 (Not Found)
interestPoints.js:1          Failed to load resource: the server responded with a status of 404 (Not Found)
jquery-migrate-3.3.2.min.js:2 JQMIGRATE: Migrate is installed, version 3.3.2
interestPoints.css:1          Failed to load resource: the server responded with a status of 404 (Not Found)
DevTools failed to load source map: Could not load content for http://localhost/tmp/assets/5bf266fe/pjax.js.map: HTTP error: status code 404, net::ERR_HTTP_RESPONSE_CODE_FAILURE
DevTools failed to load source map: Could not load content for http://localhost/tmp/assets/c0c3a4e0/moment-with-locales.min.js.map: HTTP error: status code 404, net::ERR_HTTP_RESPONSE_CODE_FAILURE
DevTools failed to load source map: Could not load content for http://localhost/tmp/assets/d263c8d/bootstrap.min.css.map: HTTP error: status code 404, net::ERR_HTTP_RESPONSE_CODE_FAILURE

You should send the lss export.
I created a simple multiple text question, used the link to your image and everything was fine.
But you seem to insert something else.
E.g. I don't understand why the text fields are displayed in the question.

Joffm 

It sounds to me like you have some server permissions problems.

Thanks for you response. Attached is the lss of the survey I created.

Thanks.
In: /var/www/html/limesurvey I did: sudo chmod -R a+r+w+x *
It did not help.
It is question Q2 in the lss that I sent.

Sorry, there must be something odd on your side.

I only imported your survey 
 

I relocated the folder "interestPoints" from "/upload/themes/question" to your "/themes/question"
Same result.
 

Joffm

But anyway, it looks different from your last screenshot.(that with the textfields at the bottom)

I could reproduce this design when I changed something in the js-file, so it didn't work anymore.


 

Thanks for trying this. I think your are definitely right that something in my installation is wrong. I'll try to find out.

I reinstalled LimeSurvey, and now it works! Thanks!

Is it possible to have only the + sign available (would be nice, but if not I am fine with it as it is)

 

I have a survey with two clickable maps. If I preview each of them individually, both work fine. When I run the survey as a whole, the first one works fine, but the second does not work, I am not able to drag the markers on the map. Attached is de lss of the survey. I used the version found at:  github.com/tpartner/LimeSurvey-Image-Interest-Points-3x , and LimeSurvey  version   3.28.37+221108 . Is there - hopefully - any solution for this problem?

 

When the maps are included in different question groups, then both maps work fine.