Installation problems

[oldmanbigkid]

Getting this page and also no formatting on the calendar (see attached screen shot)
The paths appear to be incorrect in the calendar.php file.
The correct path(s) could NOT be determined automatically.
The serverPath needs to be set. Please check with your web host provider for assistance if you are unsure.
The urlPath needs to be set. Please check with your web host provider for assistance if you are unsure.
Please edit the calendar.php file and set the appropriate path(s).
This warning will cease once the correct paths have been set and this page has been refreshed.

Please make the recommended changes then Click Here to try again...

My other installation never needed url or server path as calendar folder is at root


However, when uploading, got the following errors...

553 Can't write 4.4.0,1af10719ad5b4faae05cfe60e7cd2af4,1.ser. Invalid characters in name.
: /calendar/includes/htmlpurifier/library/HTMLPurifier/DefinitionCache/Serializer/HTML/4.4.0,1af10719ad5b4faae05cfe60e7cd2af4,1.ser
553 Can't write 4.4.0,eacc850f374809ac48f7517bab83b4d0,1.ser. Invalid characters in name.
: /calendar/includes/htmlpurifier/library/HTMLPurifier/DefinitionCache/Serializer/HTML/4.4.0,eacc850f374809ac48f7517bab83b4d0,1.ser
553 Can't write 4.4.0,fdfc1465c1553db684e2f90f64511cd4,1.ser. Invalid characters in name.
: /calendar/includes/htmlpurifier/library/HTMLPurifier/DefinitionCache/Serializer/URI/4.4.0,fdfc1465c1553db684e2f90f64511cd4,1.ser

[oldmanbigkid]

managed to figure out the correct url and server settings for the calendar.php

Would have deleted this thread but can't see how to.