Hello @v1101,
Allowed templates for experienced fragments should be set for XF root folder, for example at /content/experience-fragments.
You need to define cq:allowedTemplates property as String[] and set all available templates there, example:
/libs/cq/experience-fragments/components/experiencefragment/template
/conf/we-retail/settings/wcm/templates/experience-fragment(.*)?
You need to add experience fragment template in the allowed templates (cq:allowedTemplates = /conf/test-project/settings/wcm/templates/experience-fragment) instead of allowedPaths on the /content/experience-fragments/<project>.
Thanks!!