Admin Change Form Page Blank

[oesah]

What version of Unfold are you using? 0.40.0

What version of Django are you using?

4.2.16

What browser are you using?

Firefox 131.0.2 and Chrome 129.0.6668.100

Did you checked changelog/commit history, if the bug is not already fixed?

Yes

Did you searched other issues, if the bug is not already fixed?

For example: Yes or No

Did you checked documentation?

Yes

Are you able to replicate the bug in the demo site?

No

Repository with reproduced bug

It's private project, I cannot share the code.

Describe your issue

change_form pages on some models are just blank (white). The console shows:

alpine.js:5 Uncaught TypeError: Cannot read properties of undefined (reading 'startsWith')
    at alpine.js:5:2789
    at fr.reduce.name (alpine.js:5:2935)
    at Array.reduce (<anonymous>)
    at alpine.js:5:2921
    at Array.map (<anonymous>)
    at de (alpine.js:5:2049)
    at alpine.js:5:5151
    at T (alpine.js:5:3875)
    at T (alpine.js:5:3932)
    at T (alpine.js:5:3932)

On some models there is no issue, it only affects some of my models. Here is one example of a model that works:

class SubjectCategory(models.Model):
    description = models.TextField(blank=True, null=True)
    approved = models.BooleanField(default=False)
    name = models.CharField(max_length=256, unique=True)
    created_by = models.ForeignKey(
        User,
        on_delete=models.SET_NULL,
        related_name="%(app_label)s_%(class)s_created",
        null=True,
        blank=True,
    )
    responsible = models.ForeignKey(
        User,
        on_delete=models.SET_NULL,
        related_name="%(app_label)s_%(class)s_responsible",
        null=True,
        blank=True,
    )

@admin.register(models.SubjectCategory)
class SubjectCategoryAdmin(unfold_admin.ModelAdmin):
    list_display = ("name", )

Here is a model that does not work:

class Vendor(models.Model):
    url = models.URLField(blank=True, null=True)
    attributes = models.ManyToManyField(
        Attribute,
        blank=True,
        related_name="vendors",
    )
    approved = models.BooleanField(default=False)
    name = models.CharField(max_length=256, unique=True)

@admin.register(models.Vendor)
class VendorAdmin(BaseAdminMixin, unfold_admin.ModelAdmin):
    list_display = ("name", )
    search_fields = ("name", "url")

For some reason, on the second model it does not seem to initiate the JS part properly. I can play around with the html and remove the attribute "x-cloak" and then I see the content, but the JS is not working.

I cannot find anything important that's different in these models or admin config.