Update issue with belongsToMany

[x2princ3]

Couple of issue:

1. we cant filter belongsToMany records.
   Multiselect::make('Admins') ->belongsToMany(User::class, false),
   I wanted to load only admin users in admins list, but I could not found any way to filter. So I changes my code as below.
   Multiselect::make('Admins') ->options($users) ->resolveUsing(function ($value) { return $this->resource->admins->pluck('id')->toArray(); }) ->fillUsing(function ($request, $model, $attribute, $requestAttribute) { // Save the community first to obtain its ID $model->save(); $adminIds = $request->input($requestAttribute, []); $admins = []; foreach ($adminIds as $adminId) { $admins[$adminId] = ['is_admin' => true, 'created_at' => now()]; } $model->enroller()->sync($admins); }) ->displayUsing(function ($value) { return $value->pluck('name', 'id')->toArray(); }),

2. In both the cases, when I do not filter my records and use ->belongsToMany(User::class, false) or when I filter my records by using above mentioned code, update is giving an error

Call to a member function getMorphClass() on null

[Tarpsvo]

Can you provide me with more information, like a stack trace of where the getMorphClass error occurs? Thanks.