I faced the same problem. For me tb v1.1.0 works fine with php in version range 7.0 to 7.2 (Fresh installation && all php settings were set according to tb recommendations, MariaDB 10.3)
With php v5.6 lot of notices && warnings, with php v7.3.5 I couldn't enter to BO (with php v7.3 still looking possible issue on my side - maybe I missed something).
Edit: Anyway - great work guys