My current suggestion would be to either use option R and reset the script and re-enable amtm import or do a complete uninstall (option U) and reinstall the script. This error could be an invalid flag set in your config, the code around verifying a valid email config (F_amtm F_settings_test) I can't see any obvious problem. Otherwise Ill need the output from options V, VV, Z or a walk through of the exact steps you went through to encounter the error.
