"No matching runner available"

Hi, we are using a runner to run a pipeline. When we check in code, it automatically starts and builds and deploys to docker containers in kubernetes. It has worked without problems for several years but on Friday it stopped. We get a message: “No matching runner available”. We get the same message when we try to redo a previous deploy that went well before. Why am I getting this message? What is wrong?

Best regards
Ingvar

Closing in favor of No matching runner available