PHP Error: Null check needed in RuleBase::getProvider() when no default provider is configured
>>> [!note] Migrated issue
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<!-- Migrated from issue #3511090. -->
Reported by: [doxigo](https://www.drupal.org/user/1331334)
Related to !491
>>>
<h3 id="summary-problem-motivation">Problem/Motivation</h3>
<p>I was testing the ScrapingBot module and when using the AI Automator module without configuring any AI provider, the module throws PHP errors instead of providing a meaningful error message. </p>
<pre>Warning: Trying to access array offset on null in /var/www/html/web/modules/contrib/ai/modules/ai_automators/src/PluginBaseClasses/RuleBase.php on line 620<br>The website encountered an unexpected error. Try again later.<br><br>TypeError: Drupal\ai_automators\PluginBaseClasses\RuleBase::getProvider(): Return value must be of type string, null returned in Drupal\ai_automators\PluginBaseClasses\RuleBase->getProvider() (line 628 of modules/contrib/ai/modules/ai_automators/src/PluginBaseClasses/RuleBase.php).</pre><h4 id="summary-steps-reproduce">Steps to reproduce</h4>
<p>- Install the AI module and enable the AI Automators submodule<br>
- Do not configure any AI provider<br>
- Try to use an AI Automator feature that uses the default_json provider with ScrapingBot without any active AI Provider</p>
<h3 id="summary-proposed-resolution">Proposed resolution</h3>
<p>Provide a meaningful error and make it possible for other modules to use it outside of the AI provider's scope</p>
issue