I’ve just completed installation on a virtual host and I have experimented with upgrading a few time (starting over from database backups). Here are my findings after upgrading to 2.7.0:
Clicking on existing requests or the “create request” link results in the error descrobed above
Clicking on closed requests global filter results in a blank page. (no html in the source what soever)
I suspect the culprit is that we have non-us characters in on of our custom request fields (a multi-level drop down field).
After the upgrade i can still go to admin->tools->custom request fields and click on this particular field
If i then click on save (without editing) i can create/view requests, but i still cannot view the “closed request” page.
Also when going to admin->tools->custom request fields and click on this field It does not display the field it just displays as if it was an empty multilevel drop down.
Looking into the difference of the HS_CustomFields table before and after the save i can see that the non-us chars are saved differently. (both display correctly in HelpSpot).
Don’t know if you get the picture, I could send screendumps