Errors Litespeed installment Debian

[Egon]

Basic translation of the error is "line xxx: [: unilateral operator was expected, = found"

I just changed from Debian 6 to Debian 7 Wheezy. Now I can't get Litespeed installed.

It used to work just fine. Now I get

./functions.sh: regel 112: [: eenzijdige operator werd verwacht, = gevonden

at start. Then

ATTENTION: The user '' must be able to access the destination directory.

After the email address the error

./functions.sh: regel 295: [: eenzijdige operator werd verwacht, = gevonden

When trying to set the group to www-data, it tells me

[ERROR] 'www-data' is not valid group for user '', please choose
another group in the list or add user '' to group 'www-data' 
first.

When I find a group it accepts I get

./functions.sh: regel 377: [: eenzijdige operator werd verwacht, = gevonden

Next the HTTP port

./functions.sh: regel 441: [: eenzijdige operator werd verwacht, != gevonden

Admin port

./functions.sh: regel 485: [: eenzijdige operator werd verwacht, != gevonden

Installing php...

./functions.sh: regel 926: [: eenzijdige operator werd verwacht, = gevonden
Your current PHP engine /usr/local/lsws/fcgi-bin/lsphp is renamed to lsphp.old
./functions.sh: regel 1086: [: eenzijdige operator werd verwacht, = gevonden

At the end

./functions.sh: regel 1239: [: eenzijdige operator werd verwacht, = gevonden
Would you like to start it right now [Y/n]? 

[ERROR] Failed to start litespeed!
litespeed: geen proces gevonden
[ERROR] Failed to start litespeed!

[ERROR] Failed to start the web server. For trouble shooting information,
        please refer to documents in "/usr/local/lsws/docs/".

Any idea how to fix this?