ActionView::Template::Error: undefined method 'to_i' for an instance of Array (ActionView::Template::Error)

## Error

```
undefined method 'to_i' for an instance of Array (NoMethodError)
Did you mean? to_s
to_a
to_h
```

## Stack trace

```
kaminari/activerecord/active_record_model_extension.rb:17 in ApplicationRecord.page
active_record/relation/delegation.rb:79 in block in User::ReputationPeriod::GeneratedRelationMethods#page
active_record/relation.rb:939 in _scoping
active_record/relation.rb:467 in scoping
active_record/relation/delegation.rb:79 in page
app/commands/user/reputation_period/search.rb:20 in call
mandate/call_injector.rb:10 in User::ReputationPeriod::Search.call
app/assemblers/assemble_contributors.rb:29 in users
mandate/memoize.rb:47 in block (2 levels) in __mandate_memoize
app/assemblers/assemble_contributors.rb:8 in call
```

## Tracking Details
- **Project**: exercism-rails
- **Sentry**: [ActionView::Template::Error: undefined method 'to_i' for an instance of Array (ActionView::Template::Error)](https://thalamus-ai.sentry.io/issues/119489554/)
- **Culprit**: CommunityController#show
- **First seen:** May 13, 2026