Issue playing with building blocks?

In case you face any issues please use the following command to have he demo UI working with your services.

docker compose exec zookernel bash
# From the container run the following commands:
curl -o /usr/lib/cgi-bin/foss4ws.js https://raw.githubusercontent.com/ZOO-Project/workshops/master/2023/foss4g/files/foss4ws.js
curl -o /usr/lib/cgi-bin/Mask.zcfg https://raw.githubusercontent.com/ZOO-Project/workshops/master/2023/foss4g/files/Mask.zcfg
curl -o /usr/lib/cgi-bin/BufferMask.zcfg https://raw.githubusercontent.com/ZOO-Project/workshops/master/2023/foss4g/files/BufferMask.zcfg
curl -o /usr/lib/cgi-bin/BufferRequest.zcfg https://raw.githubusercontent.com/ZOO-Project/workshops/master/2023/foss4g/files/BufferRequest.zcfg

Load the url again, it should work properly now.