Looking for direction

[JP1]

Site: https://www.lincolnsofdistinction.org/vbulletin/

Long, long story but after having our site hacked we upgraded to VB5, changed hosts, yada, yada, yada and was never what I would call back to 'normal'. After over a year of various problems, we were apparently hacked again? Since being back online, numerous issues continue...

Stepping through the forums in an attempt to locate a common denominator for the errors being encountered, the following was documented...

Site and Club Information
General Info for Members and Visitors
- Rules of Conduct, Policies, Notices, etc? seems normal.
LOD Community
New User Introduction Forum
- No topics listed.
- 467 topics / 6,678 posts
- Click on last post will bring up thread.
General Lincoln Discussion
- ONE sticky topic, no other topics listed
- 1,948 topics / 20,788 posts
- Click on last post will bring up thread.
The Glove Box
- 511 pages
- Topic: Post a picture you took today (high traffic w/ 5,802 responses)
- Incomplete node / Exception trace
- Incomplete Node on pages 2, 3 with no topics listed
- Incomplete node / Exception trace on many topics
- hovering mouse over topics brings up preview of first post
- click on go to last post button in listing gives error? That action could not be completed. Please try again, and if this occurs again please contact the system administrator and tell them how you got this message.
- Very old posts show up normal.
Members Rides
- 32 pages
- Incomplete node / Exception trace on many topics
- hovering mouse over topics brings up preview of first post
- click on go to last post button in listing gives error? That action could not be completed. Please try again, and if this occurs again please contact the system administrator and tell them how you got this message.
- Very old posts show up normal.
LOD Events and Gatherings
- No topics listed.
- 676 topics / 9,429 posts
- Click on last post will bring up thread.
All Ford Carlisle
- No topics listed.
- 432 topics / 7.268 posts
- Click on last post will bring up thread.
Website and Message Board News
- 9 pages
- Page 2 = Incomplete Node
- Incomplete node / Exception trace on many topics
- Click on last post will bring up thread.
- Very old posts show up normal.
In Memoriam
- Several Incomplete node / Exception trace

Going further simply resulted in more of the same all throughout the forums.

Examination of server error log via cPanel shows a preponderance of AH01797 client denied by server configuration errors.

Besides the obvious phantom threads/posts, the most recent complaints range from not being able to log in to not being able to post pics.

At this point, I'm just looking for some advice and direction on where to begin to get things back to where they were.