The Central Water Commission examined Karnataka's revised proposal and said the 2019 DPR could no longer be processed because the project had undergone substantial changes.
Meta's global executives have been asked to stay back for another round of discussions on Thursday, when Vaishnaw is scheduled to meet them again along with members of the company's technical team.
The move comes amid calls by several student unions for a 'Vidhan Sabha gherao' on August 7 and August 10 over alleged irregularities in the JPSC and JSSC recruitment examinations.