wms/wfs don't work with maps.awi service

service: https://maps.awi.de/awimaps/catalog/

dataset wms url: https://maps.awi.de/services/projects/digital_earth/mueglitz_tal/wms

error:

TypeError: Cannot read property 'Service' of undefined
    at WMSCapabilityConverter.getProviderName (WMSCapabilityConverter.ts:24)
    at DemapAddLayerForm.vue?cd21:313

wfs doesn't work either!

https://maps.awi.de/services/projects/digital_earth/mueglitz_tal/wfs

error:

Error: Request failed with status code 400
    at createError (createError.js:16)
    at settle (settle.js:17)
    at XMLHttpRequest.handleLoad (xhr.js:61)