Fix Mapcache WMTS in QGIS - type unknown error
Suggested PR & linked issue https://github.com/MapServer/mapcache/pull/248 https://github.com/MapServer/mapcache/issues/247 Suggested solution https://github.com/MapServer/mapcache/pull/248#pullrequestreview-628959909 to be added to our branch as patch or directly to the PR. Related issue: #88 (closed)