ver. 1.5 rss errors

I keep receiving the following error on my wp-rss2.php file (https://www.rirealestateblog.com/wp-rss2.php). With the original file downloaded from wordpress, I receive this error:

XML Parsing Error: unclosed token
Location: https://www.rirealestateblog.com/wp-rss2.php
Line Number 2, Column 1:
^

I searched the forum and came across the thread below.

https://www.ads-software.com/support/topic.php?id=12362#post-73773

and tried the suggestion of eliminating any whitespace. After taking out whitespace, I get this error:

XML Parsing Error: unclosed token
Location: https://www.rirealestateblog.com/wp-rss2.php
Line Number 1, Column 39:

Back to searching, came across this thread:

https://www.ads-software.com/support/topic.php?id=21434#post-121800

tried that to no avail. Any suggestions would be greatly appreciated.