Chelys might be present in the Tavern, just not visible due to her being in stealth. You might try looking for her with True Seeing active (there are items you can use for this, if necessary). This was a bug that cropped up in earlier versions of the module but it should have been corrected as of v. 1.06+
Are you playing the most up to date version of the module?
Are you playing the most up to date version of the module?
followed by clicking on your PC to update your journal and complete the quest, allowing you to proceed with Hamad.
If you are not familiar with the procedure for entering "Debug Mode" and using such "cheat codes" I can explain it further.