Numbers and signs instead of letters

[fmagrosoto]

Hi there.
I'm trying to use PDFMerger in XAMPP (7.2.4) in MacOS Mojave.
But the output file contains numbers and signs instead of letters.
I don't know how to fix this issue.
Can you help Us?

Here's an example:

)"$+'/01#+'()2)"'1/-'&+$-3'),1$-$-#"'&(/0/1*/,4'$2/-5'6-'&-'1&0/$,'4"&7/(&3'0#27/,&"'&,-$'
#-3'8&#/%#1'$,/+5'!9&1$22#1'&#4#$'#",&3'7$9/#2&',),'09&"$-"&',$3'%2&,(/-'&-'2&#15'
:#22&+'1/-'&+$-'2/4#2&'2#-#13'$2$+$,-#+'2/4#2&'7$23'0)1#$"$'"/1#15';#/1<#$'7/-&$'+)22/1'
2&#15'=),$'&'#2-"/$1'+&#"/15'>$1-/%#2#+'7$2'/01#+'$#'$2/-'"#-"#+'),(/+$,-#+'
-/,/(#,-'$-'+&11&5'?,-$4$"'+&@/+#1'&,-$'$#'+&#"/1'%/%$,(#+3'7/-&$'2&/,/&',/1/'4"&7/(&5'
:&+'<#/1'),1$<#&-',#,5'!")/,'&'$@'7/-&$'1$+'8$#4/&-'),7&22/15' :#22&+'&'1&0/$,'
(&0/%#13'8/,/%#1',/12'$#3'"#-"#+'1&0/$,5'A#"&%/-#"'2$-#1'+&#"/13'1)22//-#(/,'1$('$") 1'#-3'
2#-#1'7$,$,&-/1'B#1-)5'=),$'-$+0#1'&2/<#&+'(/&+'7/-&$'-$+0)"5':&+'<#/1'2/%$")'7/-&$'
+$-#1'+&@/+#1'4"&7/(&'/,',),'&"#5

We need help!!
Thanks in advance.