Argument 4 passed to Grav\Plugin\Form\TwigExtension::prepareFormField() must be of the type array

[salgua]

After the upgrade to v5.1.0, editing a page from admin panel I receive the following error:

Argument 4 passed to Grav\Plugin\Form\TwigExtension::prepareFormField() must be of the type array, string given

Grav and all plugins are to latest available version. PHP is 7.4

[mahagr]

Can you see where the error comes from? If you enable debugger, you should be able to see the full backtrace.

[salgua]

Sorry... it comes from:

Argument 4 passed to Grav\Plugin\Form\TwigExtension::prepareFormField() must be of the type array, string given, called in ..../cache/twig/e1/e1c19b537f943e3c2da59d00cbbb0bac95bb2882df307317d9a0fed91f884da5.php on line 217

...

 user/plugins/form/classes/TwigExtension.php

row from 72 to 91

    {
    // Make sure that the field is a valid form field type and is not being ignored.
    if (empty($field['type']) || ($field['validate']['ignore'] ?? false)) {
        return null;
    }

    // Check if we have just a list of fields (no name given).
    if (is_int($name)) {
        $name = null;
    }

    // Make sure that the field has a name.
    $name = $name ?? $field['name'] ?? null;
    if (!is_string($name) || $name === '') {
        return null;
    }

    // Prefix name with the parent name if needed.
    if (str_starts_with($name, '.')) {
        $name = $parent ? $parent . $name : (string)substr($name, 1);

[mahagr]

What I am interested in is that Twig file /cache/twig/e1/e1c19b537f943e3c2da59d00cbbb0bac95bb2882df307317d9a0fed91f884da5.php should have a comment on what the real twig filename is and if you go to line 217, there should be a comment above it to tell the line where it happens.

[salgua]

here the comment:

/* forms/fields/fieldset/fieldset.html.twig */

then at the end of the file I find:

user/plugins/admin/themes/grav/templates/forms/fields/fieldset/fieldset.html.twig

but the file has fewer than 217 rows

[mahagr]

Try to change fieldset line 57 to:

{% set child = prepare_form_field(child, child_name, field.name, {key: key}) %}

That should fix the issue.

[salgua]

it works!
Thank you very much!

[mahagr]

Let me move this issue to admin as the issue is in there.