Can't grab a screenshot from the QGIS2web Openlayers map

[Krukarius]

I would love to have my screenshot capture button working.

I came across a few solutions with Openlayers export PDF, export PNG and so on. None of them were working.
Recently I tried the HTML2canvas solution, but still with no result.

All my queries are here:

https://gis.stackexchange.com/questions/379451/making-a-screenshot-from-qgis2web-openlayers-map?noredirect=1#comment620332_379451

https://stackoverflow.com/questions/64823306/save-openlayers-map-as-pdf-offline-version

https://stackoverflow.com/questions/64875245/html2canvas-screenshot-not-working-offline

https://stackoverflow.com/questions/64875940/html2canvas-document-getelementbyid-todataurl-is-not-a-function

https://stackoverflow.com/questions/64877723/html2canvas-in-offline-version-tainted-canvases-may-not-be-exported

https://stackoverflow.com/questions/64875940/html2canvas-document-getelementbyid-todataurl-is-not-a-function

https://gis.stackexchange.com/questions/379339/qgis2web-openlayers-map-export-as-png

https://gis.stackexchange.com/questions/379158/qgis2web-export-open-layers-map-as-pdf-png-or-jpeg

and basically my ideas are runned out right now. Is there any at least one way to export this map in at least one format?
I am aware of CORS issues, but I don't know how to fix them. I came through the ol.js file and changed all crossorigins from I or o to "anonymous". I also put Crossorigin:anonymous in the ol.mpa section:

    var map = new ol.Map({
       controls: ol.control.defaults({attribution:false}).extend([
      expandedAttribution,new ol.control.ScaleLine({}),new measureControl(),new geolocateControl()
      ]),
      target: document.getElementById('map'),
      renderer: 'canvas',
  crossOrigin: 'anonymous',
      overlays: [overlayPopup],
      layers: layersList,
 format: 'image/png',
     view: new ol.View({
         maxZoom: 22, minZoom: 17
     })
    });

not working at all.

I want to launch this option offline. Does it course the aforementioned problems?