So I just migrated the website in its entirety to a new hosting company.
The hosting service has all the necessary requirements.

I exported the MYSQL database, recreated the database on the new server and imported the data.
The database is intact, but I had to set a new password for the database because the new hosting provider
had different rules for their MYSQL database passwords.

I updated the database IP, Name, and Password in the SilverStripe config file located at /content/mysite/_config.php

Before I updated that config with the new database info I was getting an error about not being able to reach the database.
Now that I have fixed that, I keep getting this error,

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Warning: require_once(/vweb/vx/vx18823/content/SortableGridField/_config.php): failed to open stream: No such file or directory in /data/19/4/72/146/4561961/user/5405413/htdocs/content/framework/core/manifest/ClassLoader.php on line 57

Fatal error: require_once(): Failed opening required '/vweb/vx/vx18823/content/SortableGridField/_config.php' (include_path='.:/data/19/4/72/146/4561961/user/5405413/htdocs/content/framework:/data/19/4/72/146/4561961/user/5405413/htdocs/content/framework/parsers:/data/19/4/72/146/4561961/user/5405413/htdocs/content/framework/thirdparty:.:/usr/share/php:/usr/services/vux/lib/php') in /data/19/4/72/146/4561961/user/5405413/htdocs/content/framework/core/manifest/ClassLoader.php on line 57
=======================================================================================================================

Sorry if this is a really simple question, PHP and website development is not usually within my normal scope of work.
I do however have basic understanding of these programming languages, so feel free to mention anything that you think
might help. lol.

Best Regards,
Matt O.

Run "/dev/build/?flush=all" ? It looks like you maybe copied the silverstripe-cache folder along and the ClassLoader is looking for the SortableGridField module at wrong path.

I dumped all the cache files into WinGrep and found the lines containing the old path.
I updated all the cached paths to the new location.
That fix that issue.

No I'm getting this horrible little message about
"Invalid argument supplied for foreach() in framework/core/manifest/ConfigManifest.php on line 102"

But I'll open another topic for that.

Thanks.