Hi,

This error is caused by the JavaScript environment used to load the Odoo web client, not by the database itself. The key message is “Object.groupBy is not a function”, which means the browser running Odoo does not support the Object.groupBy feature that newer Odoo versions rely on in their frontend code. When Owl tries to render the interface, it fails early and shows the generic “Something went wrong…” message. This usually happens when Odoo is opened in an outdated browser, an embedded webview, or a system with cached or overridden JavaScript assets. To resolve it, open Odoo in a fully up-to-date browser such as the latest Chrome, Firefox, or Edge, clear the browser cache, and reload the page. If the problem appears only for this database, also check whether any custom theme or frontend-related module is installed, as these can bundle old JavaScript or interfere with native browser objects.

Hope it helps

HIi,
You're using groupBy(), which is a modern JavaScript method not supported in some older browsers or environments.Use Array.prototype.reduce() or lodash.groupby() instead of groupBy()

• If you (or a module) are using:

js 

Object.groupBy(data, ...)

Replace it with:

data.reduce((acc, item) => {

    const key = item.someKey;

    (acc[key] = acc[key] || []).push(item);

    return acc;

}, {});

Or install a polyfill if custom JS must use Object.groupBy()

Add this in your custom JS:

if (!Object.groupBy) {

  Object.groupBy = function (items, callback) {

    return items.reduce((result, item) => {

      const key = callback(item);

      (result[key] = result[key] || []).push(item);

      return result;

    }, {});

  };

}

Check your custom modules or recent theme updates

→ They might be using Object.groupBy() improperly.

i dont know which version you will use you make custom module or not 
there is one way for solution

i hope it is use full