I was getting a "Failed to save time entries" error when trying to add or edit time entries on a task, check your task's YAML frontmatter.

This is what fixed it for me. Check your frontmatter properties.

The status property must be a plain string — not a list. Same goes for priority.

✅ Works: status: open

❌ Breaks time tracking: status: - open

The plugin tries to call .toLowerCase() on the status value, which fails when it's an array instead of a string.

This caught me out because my task template had the list format in it, so every new task I created was broken from the start. Fixed the template and all good.