Task Sequence (TS) created in previous ConfigMgr versions may fail during import in 2103.
- TS created in 2103, exported and then imported is working.
- TS created in 2103 and where steps from an existing TS is copied to it will fail like shown in the GIF below.
This has been confirmed being an issue on both ConfigMgr 2103 TP and public edition.
Note. It has been reported to Microsoft and they are going to address this.