Looks like server side issues, if you're hosting a server that could be what's crashing shit, looking from this screenshot you've just posted.

it appears to be some sort of syncerror

BaseExeption

haha

Looks to me like a problem with the miniqlx plugin / qlstats, judging by my google hit on this line of code:

self.msg("^1echo Problem fetching {} glicko: {}".format(gt, last_status))

Seems likely to me that the plugin got http error code 500 ("internal server error") from http://qlstats.net:8080/ and those errors are it simply trying to tell you that something was wrong (and possibly not coping perfectly with the error condition).

The good news is the server error with qlstats.net is presumably resolved already.

Anthony is right.

This occurred because a request to the qlstats API returned error code 500. The 'echo' is just a typo, which I will fix in the next release.

I have not seen this exception error before, but I'm guessing the server minqlx log will contain more information.

Do you remember which server this was on? Was it dkgz's CTF CA-style server?
I believe that one is hosted by Turkey, have him on my friends list.

Thanks for reporting ;-)