Sorry to be a pain. Yesterday while logged in the ACP I discovered 7 new pages of server errors.
I figured these errors were probably being caused by one of the two DBTech add-ons because they all clearly say - [DBTech\Shop:blah blah blah]—and plus I'm currently already (~2 weeks into) waiting for the DBTech guys to resolve another issue pertaining to a supposed "orphaned post" relating to their DBTech Shop add-on.
So instead of hitting up DBTech, last night I hired another dev to come see if he could sort out these latest errors.
I've just woken up and found his assessment of the errors.
According to him, these errors are related to the [XenSoluce] 'Custom Colours Picker' add-on.
Note:
I actually really like this Custom Colours Picker add-on and I've been using it for several days already with no problems at all since the initial errors were resolved, so I'm unsure why these latest errors didn't occur until yesterday.
The only things I did differently yesterday was: (a) installing the 'Rosters' add-on which integrates with an existing 'Tournaments' add-on, and (b) I tidied up some of the existing DBTech Shop items.
(*Happy to set you up with an admin access account if ya wanted/needed to take a look(¿?))