Hello Dears

i recently tried to find a root with "FindRoot" in Mathematica. I know that the problem has a solution, but when using FindRoot, this error appears :

FindRoot::lstol: The line search decreased the step size to within tolerance specified by AccuracyGoal and PrecisionGoal but was unable to find a sufficient decrease in the merit function. You may need more than 10000.` digits of working precision to meet these tolerances. >>
t->{0.1139}

however it gives me an answer, but this is not the real accurate one! even though I changed the AccuracyGoal, PrecessionGoal and WorkingPrecession. the answer didn't change. I attached my code here. please help me getting rid of the error. Thanks.

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