CLIC-1901 for Relapsed/Refractory CD19 Positive Cancers

Inclusion Criteria: 1. Participant must have relapsed or refractory CD19+ disease as defined by one of the following: a. Relapsed or refractory acute lymphoblastic leukemia or chronic lymphocytic leukemia as defined by one of the following: i. Second or greater relapse ii. Any relapse after allogeneic stem cell transplantation (SCT) iii. Chemorefractory as defined by not achieving CR after 2 cycles of a standard induction chemotherapy or one cycle of salvage therapy b. Histologically confirmed B-cell non-Hodgkin's lymphoma including but not limited to diffuse large B-cell lymphoma (DLBCL) not otherwise specified, primary mediastinal large B-cell lymphoma, or transformed follicular lymphoma, Richter's, Burkitt's or Mantle Cell lymphoma with one of the following: i. Second or greater relapse ii. Any relapse after autologous or allogeneic SCT iii. Chemorefractory as defined by not achieving CR after 2 cycles of a standard chemotherapy or one cycle of salvage therapy 2. All eligible participants must have documentation of CD19 tumour expression demonstrated in tissue biopsy, bone marrow or peripheral blood within the 3 months prior to study screening. 3. Adequate organ function 4. Participant age: 18 to 75 years. 5. Provide written informed consent Exclusion Criteria: An individual who meets any of the following criteria will be excluded from participation in this study: 1. Isolated extra-medullary disease. 2. Participants with concomitant genetic syndrome, such as Fanconi anemia, Kostmann syndrome, Shwachman syndrome or any other known familial bone marrow failure syndrome. 3. Prior malignancy, except carcinoma in situ of the skin or cervix treated with curative intent and with no evidence of active disease. 4. Prior treatment with any gene therapy product. 5. Participants with polymerase chain reaction (PCR) positive hepatitis B, hepatitis C, or Human Immunodeficiency Virus (tested within 8 weeks of screening), or any uncontrolled infection at screening. 6. Presence of active Graft Versus Host Disease requiring systemic therapy. 7. Participants who have undergone allogeneic SCT less than 6 months prior to CLIC-1901 cell infusion or who have undergone donor lymphocyte infusion less than 6 weeks prior to CLIC-1901 cell infusion. 8. Active Central Nervous System (CNS) involvement by malignancy, defined by CNS-3 per National Comprehensive Cancer Network guidelines. 9. History of anaphylaxis to gentamicin or its derivatives. 10. Participant has received an investigational agent within the 30 days prior to enrolment visit. 11. Pregnant or nursing women.