I am trying this a second time with the latest version 251 of GroupJive

I installed all pieces exactly in the order that the cbjg_manual instructed - plug-in first, then integrations, and then the mods.

I again received the same error as the last installation when trying to install the int_groupjivefile_251.zip

Not Acceptable

An appropriate representation of the requested resource /xxx/xxx/index.php could not be found on this server.

Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request.
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I then tried to install the mod_cbgropjive_j17.zip and received this error:
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Upload showPlugins - Upload Failed
ERROR: Could not find a CB XML setup file in the package.
[ Continue ... ]
Upload showPlugins - Failed
Installation file not found:
/xxx/tmp/install_4f7b87c7a96fc/
[ Continue ... ]
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I've had CB for several years now and have never run into an install error before until about a month ago when I tried to install the cbgroupjive_2.5. I never could get that to work and I had installed that in the correct order as well.

Any help would be greatly appreciated

do you have to completed uninstall the previous version first (because I did not).

I just deleted all groupjive related files and re-installed being very careful to install everything in the right order in the right places and followed instructions. I'm still getting this error as soon as I try to install the int_cbgroupjivefile_251.zip. Could someone please take a look at this for me on my site?

I had my limit set to a size much, much larger a year or so ago.

Is there is residual fields/files that I could look for and remove since I did initially load a module into CB vs joomla? I tried multiple times to delete everything - even going to the server to remove but it appears like something may be in the database and/or on server that is not being removed.