If your API is SCORM 2004, that would explain the problem - there's no function called LMSGetValue in SCORM 2004 - it's just GetValue.
Adapt's SCORM code defaults to SCORM 1.2 - an explanation for why is given in the comments for SCOStart here. If you remove the line
scormWrapper.setVersion("1.2");
Then the code should correctly detect the 2004 API and use the correct functions for that API - however, please note that the SCORM 2004 tracking is completely untested.