Tabulator with Empty DataFrame Ajax Error

[HugoMichi]

Then using the Tabulator widget with an empty DataFrame, an error is displayed, that seems to be related with Ajax.
As far as I can tell, Tabulator tries to get data from ajax if none is provided and if AjaxURL is set.
A solution to fix this could be to not set AjaxURL in

panel/panel/models/tabulator.ts

Line 169 in 6d36858

ajaxURL: "http://panel.pyviz.org",

ALL software version info

panel 0.11.0

Description of expected behavior and the observed behavior

I dont expect an error when displaying an empty table

Complete, minimal, self-contained example code that reproduces the issue

import pandas as pd
import panel as pn

table = pn.widgets.Tabulator(pd.DataFrame(columns=['foo','bar']))
pn.panel(table).show()

Stack traceback and/or browser JavaScript console output

Access to fetch at 'http://panel.pyviz.org/' from origin 'http://localhost:59931' has been blocked by CORS policy: Response to preflight request doesn't pass access control check: Redirect is not allowed for a preflight request.
panel.pyviz.org/:1 Failed to load resource: net::ERR_FAILED
tabulator.js:13150 Ajax Load Error - Connection Error: TypeError: Failed to fetch
tabulator.js:12988 Ajax Load Error: TypeError: Failed to fetch

​

Screenshots or screencasts of the bug in action

[philippjfr]

Thanks! It should definitely never actually make the request, it's only specified because otherwise it errors immediatately.