Thread:Project:Support desk/Update previous MW 1.16.5 to 1.17.0 throws an 500 internal server error/reply (21)

Thanks for the reply. That's probably it, as I did have the Vector extension installed under 1.16.

But I removed it before upgrading to 1.17. At least I thought it was fully removed -- I deleted the files from the extensions folder and removed the references to it from LocalSettings.php. I have installed the newer version of it (for 1.17) after the update and it did not affect the link problem. Was removing it before upgrading the right thing to do? Any suggestions for how to fix it at this point?