Failed to load resource:soy template {Not all code is in Soy V 2 syntax (found file simple.soy not in Soy V2 syntax). } - jira-plugin

Question

I have two soy templates in my plugin one of them loads fine but other is not getting loaded with 500 Internal server error. I am attaching the error from console.
Here is the code I have:
{namespace JIRA.Templates.Impacttemplate.ImpactRow}
/**
* Render the information page for the Requirement Template.
* #param actor : string
#param impact: string
*
*/
{template .renderImpactRow}
<tr class="impact-soy" data-key="{$impact}" >
/*<td><span class="key">{$productName}</span></td>*/
<td><span class="key">{$impact}</span></td>
<td><span class="name">{$actor}</span></td>
</tr>
{/template}

Answer 1

Finally I could figure out the solution:
There should not be blank line after soy doc comment.
#param impact: string should be like #param impact : string
Here is the actual working code:
/**
* Render the impact.
* #param new_actor : string
* #param impact : string
*/
{template .renderImpactRow}
<tr class="impact-soy" data-key="{$impact}" >
<td><span class="key">{$impact}</span></td>
<td><span class="name">{$new_actor}</span></td>
</tr>
{/template}