A Study to Test Different Doses of BI 1823911 Alone and Combined With Other Medicines in People With Different Types of Advanced Cancer With KRAS Mutation

Inclusion Criteria: * Pathologically confirmed diagnosis of locally advanced or metastatic solid tumours, e.g. adenocarcinoma of the lung, colorectal cancer, pancreatic cancer or cholangiocarcinoma. Non-small cell lung cancer (NSCLC) patients with mixed histology are eligible if adenocarcinoma is the predominant histology. * Documented disease progression despite appropriate prior standard therapies or for whom no standard therapy exists for their tumour type and disease stage. * KRAS mutation status: Kirsten rat sarcoma virus homolog (KRAS) glycine-to-cysteine (G12C) mutation in tumour tissue or blood based on previously performed local testing using a validated test. * Provision of archival tumour tissue, if available, to confirm retrospectively KRAS G12C mutation status and for biomarker assessment. * At least one target lesion that can be measured per Response Evaluation Criteria In Solid Tumours (RECIST) version 1.1 (radiated lesions do not qualify as target lesions). In patients who only have one target lesion, and a biopsy of the lesion is required, the baseline imaging must be performed before the biopsy or at the earliest two weeks after the biopsy. * Eastern Cooperative Oncology Group (ECOG) performance status of 0 or 1. * Adequate organ function as follows: * Absolute neutrophil count (ANC) ≥1.5 x 10\^9/L (equivalent values: ≥ 1.5 x 10³/μL or ≥ 1500/mm³); hemoglobin ≥9.0 g/dL (equivalent values: ≥ 90 g/L or ≥ 5.6 mmol/L); platelets ≥100 x 10\^9/L (equivalent va…