I would like to draw features in the OpenLayers map geerated by QGIS2web plugin. Since eveything seems to be alright and all the features come out now, unlike the recent situation.

My full code is here:

https://jsfiddle.net/go39r4j7/

but I am not convinced enough about the situation, as I keep getting the error:

TypeError: Cannot read properties of null (reading 'get')

which points out the following piece of code:

  map.forEachFeatureAtPixel(pixel, function(feature, layer) {
    if (feature instanceof ol.Feature && (layer.get("interactive") || layer.get("interactive") 
   == undefined)) {
        var doPopup = false;
        for (k in layer.get('fieldImages')) {
            if (layer.get('fieldImages')[k] != "Hidden") {
                doPopup = true;
              }
          }

Theoretically, I know, that I can't access the object, which is null:

https://idiallo.com/javascript/uncaught-typeerror-cannot-read-property-of-null

but any options I tried (removing this piece of code, removing the layer.get property, changing the layer.get("interactive") to my own id ("draw")) weren't successful.

Moroever this piece of code appears to be standard for similar situations like this:

https://gist.github.com/riccardoklinger/e3e2c512a366c8a6a296c10eef9c4162

How can I fix this issue? The tool works, although I am concerned about future modifications.