RecruitingDrug trialTepotinib Plus Paclitaxel in MET Amplified or MET Exon 14 Alterated Gastric and GEJ CarcinomaPurpose of this study is to define the maximal tolerated dose (MTD) and recommended phase 2 dose (RP2D) of paclitaxel and tepotinib combination therapy in patients with advanced tumors and to evaluate the efficacy of paclitaxel and tepotinib combination treatment as second-line therapy in patients with advanced gastric and gastroesophageal junction carcinomas (AGC/GEJCs) with MET amplification or MET exon 14 alterations. This study is devided into Phase 1b and Phase 2 study.