We had a consultant who was supposedly an expert on a specific CMS. Since he supposedly set it up all the time by himself, I didn't have to help much at first. We wanted 3 environments. I asked him if he wanted me to setup Apache so that all 3 were on 1 domain in different folders, or in different subdomains in the root folder. He's like "uuuummmmm the first you said?" "1 domain 3 folders?" "Uh, yeah" "Sure?" "Yeah, yeah, absolutely".
He get the first one going with a little DB help from me and then I instal phpMyAdmin for him as he said that would be best. He get's the second going. Logs in as admin. The CMS, not apache, but the CMS he is an expert in gives a vague error. He keep asking what it means. I dunno dude, you're the expert. But its an Apache error! No, sorry, apache errors arent in shades of blue with white letters and there's no 404 or 500 or anything identifying is as Apache. It's gotta be Apache errors! No, sorry dude, error are off in Apache.
"You changed an Apache setting?" "No, just notifying you the errors are off, aalways have been" "Ugh!" 2 days go by and this guy finally is seen again in an email. "Yeah guys, I'm working on this Apache error that d3k4y caused by messing with Apache"
I showed everyone the chat logs and the Apache settings and the last modified dates on the config files. I basically had to figure it out. Cookie error. He should have set a prefix on the cookies for 1 domain or decide to use 3 separate domains and tie the cookie to the subdomain.
The project carried on like this for 10 months. This guy trying to blame me when talking to my boss. Trying to blame my boss when talking to me. We were sharing emails and chat logs though, so every video conference was super awkward because he would tru to double down on my error/boss' error but just say server error and not blame anyone. We would say what server error? No, thats your CMS. Well it's only cuz of that config change? You mean bosses? Boss: wtf I didnt change anything! "Uh Uh" Boss: d3k4y's error?" "What error is that my email said this blah blah blah"
Basically had to call this dude out every week and then I would end up researching his CMS and fixing it for him. Just terrible.