Now the indicator had been working flawlessly yesterday evening. I went back to a prior version. Same problem - indicator would not run. Got the same error message.
Even when adding the indicator to a virgin chart, I got that message. What I did then was deleting all workspaces, and once the workspaces were all deleted, the error message was gone.
This points to a serious problem with serializing data. The additional data that was loaded was obviously coming from that workspace/chart. I am further investigating what may have caused the problem.
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