 The trial will be divided in two phases. In the first phase, 10-20 patients will be enrolled and treated with 300-520 mg BID of AXL1717 for 28 days. The primary endpoint of the first phase is to determine the recommended Phase 2 dose RP2D of AXL1717 in patients with recurrent or progressive glioblastoma and to assess the safety and toxicity of AXL1717 in this patient population. The study has a 33 design and the first cohort will be treated with 400 mg AXL1717 BID for 28 days repeated in up to 5 cycles. If dose-limiting toxicity DLT such as neutropenia occurs, dosing will be interrupted and the individual patient will, following normalization, be restarted on the same or a lower dose level according to standardized procedure. If two or three of the first 3 patients on a specific dose level experience a DLT during the first 28 days of treatment with AXL1717, the following patients will be treated with a lower dose level. If one DLT occurs during the first 28 days of dosing in the first 3 three patients another 3 patients will be treated with the same dose level. If 2 of the 6 patients display DLT, the next patients will be treated with a lower dose level. The highest dose level without DLT or with maximally one DLT out of 6 patients will be the RPTD. All assessments with respect to dose adjustments for subsequent cohorts will be done during the first 28 days of treatment. Non-progressing patients may be treated for a total of five 28-day cycles 24 weeks. 