Updated LimeSurvey but it returns error on admin login

[batmanjdg]

Hi, I had a survey that was working successfully for many people a few years ago (2019). I just updated LimeSurvey to version 6.21 using Softaculous in Control Panel, in an effort to keep things up to date. However, when I log in to the admin, I get this error:

CDbException
The table "{{template_configuration}}" for active record class "TemplateConfiguration" cannot be found in the database.

I'd like to be able to use the same survey again, but would prefer not to have to enter all the questions manually again. Any suggestions as to how to either get this installation working, or extract the database content to insert into a new installation? Thanks