Welcome Lina!
See my response to Jess above; it looks like this was the key piece of advice:
You may also like to search the forum archive for other topics discussing this error message.
If neither of those turn up anything useful, please open a new topic describing:
- the version of QIIME 2
- the full command you are using
- the error message you are receiving (you can truncate the list of missing IDs in this error message, but otherwise run the command with
--verbose
mode and post the rest of the error just to confirm) - the process you used to create your table and your tree. Sharing those artifacts may also help.
Good luck!