Error when Referencing Sub Report in KPI Expression

[bamtech]

Hi,

I get an error when I reference a sub report from a kpi epression.

The module is mis-builder on v17 CE.

When generating a preview I get a "TypeError: type SimpleArray_1 doesn't define round method" when I reference a sub report from one of the lines of kpi epression. Here's the trace.

Traceback (most recent call last):
  File "/odoo17/odoo17-server/odoo/http.py", line 1783, in _serve_db
    return service_model.retrying(self._serve_ir_http, self.env)
  File "/odoo17/odoo17-server/odoo/service/model.py", line 133, in retrying
    result = func()
  File "/odoo17/odoo17-server/odoo/http.py", line 1810, in _serve_ir_http
    response = self.dispatcher.dispatch(rule.endpoint, args)
  File "/odoo17/odoo17-server/odoo/http.py", line 2014, in dispatch
    result = self.request.registry['ir.http']._dispatch(endpoint)
  File "/odoo17/odoo17-server/odoo/addons/base/models/ir_http.py", line 222, in _dispatch
    result = endpoint(**request.params)
  File "/odoo17/odoo17-server/odoo/http.py", line 759, in route_wrapper
    result = endpoint(self, *args, **params_ok)
  File "/odoo17/odoo17-server/addons/web/controllers/dataset.py", line 24, in call_kw
    return self._call_kw(model, method, args, kwargs)
  File "/odoo17/odoo17-server/addons/web/controllers/dataset.py", line 20, in _call_kw
    return call_kw(request.env[model], method, args, kwargs)
  File "/odoo17/odoo17-server/odoo/api.py", line 468, in call_kw
    result = _call_kw_multi(method, model, args, kwargs)
  File "/odoo17/odoo17-server/odoo/api.py", line 453, in _call_kw_multi
    result = method(recs, *args, **kwargs)
  File "/odoo17/custom/addons/v17-custom-modules/mis_builder/models/mis_report_instance.py", line 876, in compute
    kpi_matrix = self._compute_matrix()
  File "/odoo17/custom/addons/v17-custom-modules/mis_builder/models/mis_report_instance.py", line 869, in _compute_matrix
    self._add_column(aep, kpi_matrix, period, period.name, description)
  File "/odoo17/custom/addons/v17-custom-modules/mis_builder/models/mis_report_instance.py", line 832, in _add_column
    return self._add_column_move_lines(
  File "/odoo17/custom/addons/v17-custom-modules/mis_builder/models/mis_report_instance.py", line 801, in _add_column_move_lines
    self.report_id._declare_and_compute_period(
  File "/odoo17/custom/addons/v17-custom-modules/mis_builder/models/mis_report.py", line 896, in _declare_and_compute_period
    self._declare_and_compute_col(
  File "/odoo17/custom/addons/v17-custom-modules/mis_builder/models/mis_report.py", line 753, in _declare_and_compute_col
    kpi_matrix.set_values(kpi, col_key, vals, drilldown_args)
  File "/odoo17/custom/addons/v17-custom-modules/mis_builder/models/kpimatrix.py", line 213, in set_values
    self.set_values_detail_account(
  File "/odoo17/custom/addons/v17-custom-modules/mis_builder/models/kpimatrix.py", line 244, in set_values_detail_account
    val_rendered = self._style_model.render(
  File "/odoo17/custom/addons/v17-custom-modules/mis_builder/models/mis_report_style.py", line 159, in render
    return self.render_num(
  File "/odoo17/custom/addons/v17-custom-modules/mis_builder/models/mis_report_style.py", line 180, in render_num
    value = round(value / float(divider or 1), dp or 0) or 0
TypeError: type SimpleArray_1 doesn't define __round__ method

The above server error caused the following client error:
RPC_ERROR: Odoo Server Error
    RPC_ERROR
        at makeErrorFromResponse (http://37.60.247.107:8017/web/assets/db80a43/web.assets_web.min.js:2888:163)
        at XMLHttpRequest.<anonymous> (http://37.60.247.107:8017/web/assets/db80a43/web.assets_web.min.js:2892:13)

Steps to reproduce the behavior:

1. Add sub kpis to a report template.
2. Reference the sub report from the kpi expressions.
3. Generate a preview.

This works in previous versions so I'm guessing this is unique to v17.