I manually verified that the reports were in the javascript after the closing ?> of the respective php files.
FILE: /.../wp-content/plugins/js_composer/include/templates/editors/popups/shared-templates/category.tpl.php
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FOUND 0 ERRORS AND 12 WARNINGS AFFECTING 12 LINES
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134 | WARNING | Possible use of ASP style opening tags detected. ASP style opening tags have been removed in PHP 7.0. Found: <%- post_id %>"
135 | WARNING | Possible use of ASP style opening tags detected. ASP style opening tags have been removed in PHP 7.0. Found: <%- title %>"
141 | WARNING | Possible use of ASP style opening tags detected. ASP style opening tags have been removed in PHP 7.0. Found: <%- title %></button>
155 | WARNING | Possible use of ASP style opening tags detected. ASP style opening tags have been removed in PHP 7.0. Found: <%- post_id %>"]" titl...
166 | WARNING | Possible use of ASP style opening tags detected. ASP style opening tags have been removed in PHP 7.0. Found: <%- id %>">
168 | WARNING | Possible use of ASP style opening tags detected. ASP style opening tags have been removed in PHP 7.0. Found: <%- thumbnailUrl %>" alt=""...
171 | WARNING | Possible use of ASP style opening tags detected. ASP style opening tags have been removed in PHP 7.0. Found: <%- previewUrl %>" data-tit...
173 | WARNING | Possible use of ASP style opening tags detected. ASP style opening tags have been removed in PHP 7.0. Found: <% if (!downloaded) { %>
177 | WARNING | Possible use of ASP style opening tags detected. ASP style opening tags have been removed in PHP 7.0. Found: <% } else if (downloaded &&...
181 | WARNING | Possible use of ASP style opening tags detected. ASP style opening tags have been removed in PHP 7.0. Found: <% } %>
186 | WARNING | Possible use of ASP style opening tags detected. ASP style opening tags have been removed in PHP 7.0. Found: <%- title %></span>
188 | WARNING | Possible use of ASP style opening tags detected. ASP style opening tags have been removed in PHP 7.0. Found: <%= status %>
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FILE: /.../wp-content/plugins/js_composer/include/templates/editors/partials/backend-shortcodes-templates.tpl.php
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FOUND 0 ERRORS AND 3 WARNINGS AFFECTING 3 LINES
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44 | WARNING | Possible use of ASP style opening tags detected. ASP style opening tags have been removed in PHP 7.0. Found: <%= type %>">
45 | WARNING | Possible use of ASP style opening tags detected. ASP style opening tags have been removed in PHP 7.0. Found: <%= heading %></div>
47 | WARNING | Possible use of ASP style opening tags detected. ASP style opening tags have been removed in PHP 7.0. Found: <%= form_element %>
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FILE: /.../wp-content/plugins/js_composer/include/templates/teaser.html.php
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FOUND 0 ERRORS AND 1 WARNING AFFECTING 1 LINE
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84 | WARNING | Possible use of ASP style opening tags detected. ASP style opening tags have been removed in PHP 7.0. Found: <%= id %>" src="<%= url %>"...
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