Given a Gantt chart configured to display text data as summary
or information at the right
from a field, and one of the matching artifacts contains a vertical tab in the value for this field, then it will generate a PHP fatal error.
Error while rendering JPGraph {"exception":"[object] (TypeError(code: 0): count(): Argument #1 ($value) must be of type Countable|array, float given at /usr/share/tuleap/src/embedded_vendor/jpgraph/jpgraph_gantt.php:1895)