At this point, I don't know what happened. I know the instructions don't list the includes directory. But those files were not there after the upgrade. Probably something I did inadvertently, but I have no idea what.

Am I ok with using these files from backup in the /includes directory? They are from my backup before I installed 7.6.2.

boardrules.php
closedforums.php
community_intro.php
config-bak.inc.php
config.inc.php
config.inc.php-old
coppainsert.php
footer.php
header-insert.php
header.php
index.html
intro_1.php
intro_10.php
intro_11.php
intro_12.php
intro_13.php
intro_14.php
intro_15.php
intro_16.php
intro_17.php
intro_18.php
intro_19.php
intro_2.php
intro_22.php
intro_23.php
intro_25.php
intro_26.php
intro_27.php
intro_28.php
intro_29.php
intro_3.php
intro_30.php
intro_31.php
intro_4.php
intro_5.php
intro_6.php
intro_7.php
intro_8.php
intro_9.php
privacy.php

Thanks!