Getting error: "This value should be of the correct primitive type." when adding and saving PowerBi Embed field to Content Type

I debugged this further and added the following code and printed out the value that was triggering this error in the /web/core/lib/Drupal/Core/Validation/Plugin/Validation/Constraint/PrimitiveTypeConstraintValidator.php:

    if (!$valid) {
      // @todo Provide a good violation message for each problem.
      $msg = $constraint->message . " ||| " . print_r($value, TRUE);
      $this->context->addViolation($msg, [
        '%value' => is_object($value) ? get_class($value) : (is_array($value) ? 'Array' : (string) $value),
      ]);
    }

This is the value I get along with the error message. In the config form, I had used 100, 100, 100 for the breakpoints and % as the value type:

Array
(
    [pwbi.sm] => Array
        (
            [height] => 100
        )

    [pwbi.md] => Array
        (
            [height] => 100
        )

    [pwbi.lg] => Array
        (
            [height] => 100
        )

)