That's because default wmts source xml is generated with a <Cache/> tag (see. https://gdal.org/drivers/raster/wmts.html)
Mapcache service then complains in the logs :
Warning 3: Error writing to WMS cache ./gdalwmscache/315926c4cb2fbf94e47cb04c05a9f2d5
That's because default wmts source xml is generated with a
<Cache/>
tag (see. https://gdal.org/drivers/raster/wmts.html) Mapcache service then complains in the logs :Warning 3: Error writing to WMS cache ./gdalwmscache/315926c4cb2fbf94e47cb04c05a9f2d5