The reason is that the continue button is set to disabled and therefore cannot be clicked:

Therefore, we need to investigate the default enable state of the button:

Tests show that the default value is Disable. So before unit testing, you need to find a way to enable it.

If the deliveryModeInvalid field is true, the button is set to Disabled.

Data source for deliveryModeInvalid:

return this.mode.controls['deliveryModeId'].invalid;
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Mode attribute:

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