This feed is valid, but 2 errors keep it from being read by feed readers

I can't get a proper feed because of these two error the build date is 1970?????? And missing atom link.

Can you please advise I checked my feed here http://feedvalidator.org/
I appreciate your time TIA!!!

Recommendations

This feed is valid, but interoperability with the widest range of feed readers could be improved by implementing the following recommendations.

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line 7, column 46: Implausible date: Thu, 01 Jan 1970 00:00:00 GMT [help]

<lastBuildDate>Thu, 01 Jan 1970 00:00:00 GMT</lastBuildDate>
^

*

line 14, column 1: Missing atom:link with rel="self" [help]

</channel>
^

Source: http://cufreebiesonly.forumotion.com/feed/?f=1

1. <?xml version="1.0" encoding="utf-8"?>
2. <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/" xmlns:wfw="http://wellformedweb.org/CommentAPI/" xmlns:dc="http://purl.org/dc/elements/1.1/">
3. <channel>
4. <title>Welcome to CU Freebies Only Forum</title>
5. <link>http://cufreebiesonly.forumotion.com/welcome-to-cu-freebies-only-forum-f1/-t1.htm</link>
6. <description></description>
7. <lastBuildDate>Thu, 01 Jan 1970 00:00:00 GMT</lastBuildDate>
8. <ttl>10</ttl>
9. <image>
10. <title>Welcome to CU Freebies Only Forum</title>
11. <url>https://2img.net/h/i356.photobucket.com/albums/oo1/CUFOadmin/NEW%20FORUM%20GRAPHICS/Header_BlueBG2.png</url>
12. <link>http://cufreebiesonly.forumotion.com/welcome-to-cu-freebies-only-forum-f1/-t1.htm</link>
13. </image>
14. </channel>
15. </rss>