Errors in Reports (v. 5.4.4)

ERROR : An error occurred on 2016-09-06 at 14:56:20

2016-09-06 14:56:20.931 ***** ERROR ***** ERROR *****
2016-09-06 14:56:20.931 ***** ERROR ***** on file '/var/www/html/projeqtor/external/html2pdf/html2pdf.class.php' at line (2171)
2016-09-06 14:56:20.931 ***** ERROR ***** cause = Undefined offset: 5

2016-09-06 15:00:52.934 ***** ERROR ***** Exception-[42803] SQLSTATE[42803]: Grouping error: 7 ERROR:  column "t2.sortorder" must appear in the GROUP BY clause or be used in an aggregate function
LINE 1: ...oject  group by exp.month, exp.idProject order by t2.sortOrd...
                                                             ^
2016-09-06 15:00:52.934 ***** ERROR *****    For query : select sum(exp.realAmount) as sumCost, exp.month as scale , exp.idProject from expense exp, Project t2  where  (exp.idProject not in (0) or exp.idProject is null ) and (exp.idProject not in (0) or exp.idProject is null or (1=4) ) and (exp.idProject not in (0) or exp.idProject is null or (1=3) )  and exp.idProject not in (0) and exp.expenseRealDate is not null  AND t2.id=exp.idProject  group by exp.month, exp.idProject order by t2.sortOrder asc 
2016-09-06 15:00:52.934 ***** ERROR *****    Strack trace :
2016-09-06 15:00:52.934 ***** ERROR *****    #0 Sql->query called at [/var/www/html/projeqtor/report/expenseCostTotalPlan.php:113]
2016-09-06 15:00:52.935 ***** ERROR ***** Exception-[42803] SQLSTATE[42803]: Grouping error: 7 ERROR:  column "t2.sortorder" must appear in the GROUP BY clause or be used in an aggregate function
LINE 1: ...oject  group by exp.month, exp.idProject order by t2.sortOrd...
                                                             ^
2016-09-06 15:00:52.936 ***** ERROR *****    For query : select sum(exp.plannedAmount) as sumCost, exp.month as scale , exp.idProject from expense exp, Project t2  where  (exp.idProject not in (0) or exp.idProject is null ) and (exp.idProject not in (0) or exp.idProject is null or (1=4) ) and (exp.idProject not in (0) or exp.idProject is null or (1=3) )  and exp.idProject not in (0) and exp.expenseRealDate is null  AND t2.id=exp.idProject  group by exp.month, exp.idProject order by t2.sortOrder asc 
2016-09-06 15:00:52.936 ***** ERROR *****    Strack trace :
2016-09-06 15:00:52.936 ***** ERROR *****    #0 Sql->query called at [/var/www/html/projeqtor/report/expenseCostTotalPlan.php:113]

2016-09-06 15:05:43.234 ***** ERROR ***** Exception-[42803] SQLSTATE[42803]: Grouping error: 7 ERROR:  column "t2.sortorder" must appear in the GROUP BY clause or be used in an aggregate function
LINE 1: ...oject  group by exp.month, exp.idProject order by t2.sortOrd...
                                                             ^
2016-09-06 15:05:43.234 ***** ERROR *****    For query : select sum(exp.realAmount) as sumCost, exp.month as scale , exp.idProject from expense exp, Project t2  where  (exp.idProject not in (0) or exp.idProject is null ) and (exp.idProject not in (0) or exp.idProject is null or (1=4) ) and (exp.idProject not in (0) or exp.idProject is null or (1=3) )  and exp.idProject not in (0) and exp.expenseRealDate is not null  AND t2.id=exp.idProject  group by exp.month, exp.idProject order by t2.sortOrder asc 
2016-09-06 15:05:43.234 ***** ERROR *****    Strack trace :
2016-09-06 15:05:43.234 ***** ERROR *****    #0 Sql->query called at [/var/www/html/projeqtor/report/expenseCostTotalPlan.php:113]
2016-09-06 15:05:43.234 ***** ERROR *****    #1 include called at [/var/www/html/projeqtor/view/print.php:175]
2016-09-06 15:05:43.235 ***** ERROR ***** Exception-[42803] SQLSTATE[42803]: Grouping error: 7 ERROR:  column "t2.sortorder" must appear in the GROUP BY clause or be used in an aggregate function
LINE 1: ...oject  group by exp.month, exp.idProject order by t2.sortOrd...
                                                             ^
2016-09-06 15:05:43.235 ***** ERROR *****    For query : select sum(exp.plannedAmount) as sumCost, exp.month as scale , exp.idProject from expense exp, Project t2  where  (exp.idProject not in (0) or exp.idProject is null ) and (exp.idProject not in (0) or exp.idProject is null or (1=4) ) and (exp.idProject not in (0) or exp.idProject is null or (1=3) )  and exp.idProject not in (0) and exp.expenseRealDate is null  AND t2.id=exp.idProject  group by exp.month, exp.idProject order by t2.sortOrder asc 
2016-09-06 15:05:43.235 ***** ERROR *****    Strack trace :
2016-09-06 15:05:43.235 ***** ERROR *****    #0 Sql->query called at [/var/www/html/projeqtor/report/expenseCostTotalPlan.php:113]
2016-09-06 15:05:43.235 ***** ERROR *****    #1 include called at [/var/www/html/projeqtor/view/print.php:175]