Using TWebDBGrid Options results in errors

Hi,

I installed Web Core 1.5.0.3 on Delphi 10.4.

When I use the TWebDBGrid out of the box with just setting the Datasource the grid works fine.
However if I change one op de Options parameters I get the error "identifier not found "goFixedRowDefAlign""
If I disable that option (with is enabled by default) my app runs, but I get errors on the opening of my webpage: "Uncaught TypeError: Cannot read property 'classList' of null | TypeError: Cannot read property 'classList' of null at Object.SetRow......"

Is this a known issue?

Sorry, goFixedColDefAlign, goFixedRowDefAlign are not supported in TMS WEB Core. These were new introduced in 10.4 for the VCL design-time grid and cannot be used in TMS WEB Core itself.

Ok, I will avoid using them...
However If I use the option goSelectRow I get some errors in runtime in the browser:

ERROR
Uncaught TypeError: Cannot read property 'classList' of null | TypeError: Cannot read property 'classList' of null at Object.SetRow (http://localhost:8000/Project1/Project1.js:46798:14) at Object.RecordChange (http://localhost:8000/Project1/Project1.js:67661:16) at Object.cb (http://localhost:8000/Project1/Project1.js:222:26) at Object.RecordChanged (http://localhost:8000/Project1/Project1.js:64966:46) at Object.DataSetChanged (http://localhost:8000/Project1/Project1.js:40131:12) at Object.DataSetChanged (http://localhost:8000/Project1/Project1.js:64957:39) at Object.DataEvent (http://localhost:8000/Project1/Project1.js:40116:14) at Object.DistributeEvent (http://localhost:8000/Project1/Project1.js:40380:44) at Object.ProcessEvent (http://localhost:8000/Project1/Project1.js:40404:12) at Object.DataEvent (http://localhost:8000/Project1/Project1.js:38888:52)
at http://localhost:8000/Project1/Project1.js [304:11]

I could not reproduce this here so far.
Simple test: drop TWebDBGrid on the form, set goRowSelect = true in grid.Options and this works without any error here.