DCR not saving

System

I've created a new template (DCT), and during a test, I tried to Save (so I could preview and generate), the Saving function never ended (the note at the top left corner stayed at Saving... for well over an hour).

The templates in the installed TemplateExample workareas work as expected...

Any ideas?

PS: I've rechecked templating.cfg, my datacapture.cfg.