[KevinBCarney]

I thought you would like to know my hosting provider persevered and created a procedure to resolve this issue. It was….

=== From the support engineer ===
1. Deactivate the bbPress plugin.
2. Find the database version in the wp_options table and reset that back to “1”. I could have picked an actual WordPress database version (and probably something as simple as the most recent), but I knew this worked from the testing on the development site.
3. Once the database version was manually set back to 1, I had to navigate to: https://zippe.biz/wp-admin/upgrade.php. This forced WordPress to run all of the database upgrades required to get from version 1 to the latest version of the database (27916).
4. Once the upgrades had completed I needed to reset the account password for our account. I noticed this was required on both the staging site and the live site, so my hunch is it may have reset some keys. You’ll likely need to do this for all of your accounts as well.
5. After the password had been reset I was able to login and the dashboard loaded normally.

[KevinBCarney]

Stephen… That’s for the reference, but unfortunately I tried what they suggested with no change in symptoms. I’m now waiting for OptimziePress support to access my system and let me know what they find.

[KevinBCarney]

I switched my theme to twenty fourteen. I then deactivated bbPress. I still saw the Error 500 when trying to access zippe.biz/wp-admin.

I reactivated bbPress and switched back to the OptimziePress theme.

[KevinBCarney]

OK. Here is what I’ve found.

Independent of other plugins, I do not see the Error 500 when both bbPress and OptimizeMember are activated.

If only one of them is activated I see the error.

[KevinBCarney]

This is weird. When the only active plugin is bbPress, I see the Error 500. When I active bbPress and the other 19 plugins, I do not see the Error 500. I will experiment some more and get back to you.

[KevinBCarney]

When I deactivate all my plugins I still experience the Error 500 when I access zippe.biz/wp-admin.

[KevinBCarney]

Stephen… Excellent question.

When I access zippe.biz/wp-admin, I see the 404 error.

When I access zippe.biz/wp-admin/edit.php I do not.

So to get into the dashboard, I access zippe.biz/wp-admin/edit.php.

I’ll deactive all my plugins and see what happens. I’ll let you know.

[KevinBCarney]

Sorry. I forgot to include that.

Quite a few.

Active:
Akismet
AtContent
Captcha
CommentLuv Premium
Contact Form 7
Duplicate Post
Flamingo
Google Plus Authorship
Google XML Sitemaps v3 for qTranslate
Greg’s High Performance SEO
MaxButtons
Mingle Forum
nrelate Related Content
Open external links in a new window
OptimizeMember
Smart Google Analytics Code
Wordfence Security
WordPress HTTPS
WP-Optimize

Inactive:
404 Redirected: Conflicts with MingleForum, not yet deleted
bbPress
Debug Bar: Installed by my hosting provider
Developer: Installed by my hosting provider
Hello Dolly
Long Depreciated Notices: Installed by my hosting provider
P3 (Plugin Performance Profiler)
Post Duplicator
Social Sharing Toolkit
Use Google Libraries: Installed by my hosting provider
WordPress SEO

[KevinBCarney]

Stephen… Thank you for your reply.

Here is my current issue.

When the bbPress plugin is activated, I can access my website via zippe.biz/wp-admin.

When the bbPress plugin is deactivated, I can not. Instead what I see is a page that displays:

Error 500
The server encountered a syntax error, and could not complete your request.
Website owner? check your code, and your debug log, you may find a ‘parse’ error in there.
Visitor? Try and reload it in a few minutes.

I disabled then deleted bbPress and still saw the error reported above. I then re-installed and re-enabled bbPress and the error went away. I then disabled bbPress and the error returned.

I have no idea what to do next. My hosting provider is working on this as well as we’re not sure where to focus our attention.

Any help you can provide will be greatly appreciated.

[KevinBCarney]

I’m having the same issue and when I followed these instructions:
tools>forums>reset forums

The deletion of one set of tables failed.
I would attach a screen shot if I could.
Deleting Posts… Success!
Deleting Post Meta… Success!
Deleting Topic Tags… Success!
Deleting Conversion Table… Failed
Deleting Settings… Success!
Deleting Roles and Capabilities… Success!

Not sure what to do next.