I am in version 15, when I try to get a view that I build with mode tree and just one groupby function I get the next error:

TypeError: Function.prototype.apply was called on undefined, which is a undefined and not a function
    at _evaluate (https://rulesware-pulse-14-pulse15gold-6819479.dev.odoo.com/web/assets/49414-0851803/web.assets_backend.min.js:852:8)
    at Array.map ()
    at _evaluate (https://rulesware-pulse-14-pulse15gold-6819479.dev.odoo.com/web/assets/49414-0851803/web.assets_backend.min.js:849:33)
    at Array.map ()
    at _evaluate (https://rulesware-pulse-14-pulse15gold-6819479.dev.odoo.com/web/assets/49414-0851803/web.assets_backend.min.js:849:33)
    at evaluate (https://rulesware-pulse-14-pulse15gold-6819479.dev.odoo.com/web/assets/49414-0851803/web.assets_backend.min.js:858:8)
    at evaluateExpr (https://rulesware-pulse-14-pulse15gold-6819479.dev.odoo.com/web/assets/49414-0851803/web.assets_backend.min.js:711:109)
    at _preprocessAction (https://rulesware-pulse-14-pulse15gold-6819479.dev.odoo.com/web/assets/49414-0851803/web.assets_backend.min.js:20275:214)
    at Object.doAction (https://rulesware-pulse-14-pulse15gold-6819479.dev.odoo.com/web/assets/49414-0851803/web.assets_backend.min.js:20357:170)
    at async Object.selectMenu (https://rulesware-pulse-14-pulse15gold-6819479.dev.odoo.com/web/assets/49414-0851803/web.assets_backend.min.js:2430:1)

I don't use any javascript object in this view. It is just a tree view grouped by one field. Anyone have an idea why I get the error? Thanks