[12:27:14] <GiBy>	 Hi, I need assistance with an upgrade that fail, I now am stuck with a 500 error. What useful information may I provide ?
[14:18:52] <Lcawte>	 GiBy - Your webserver error logs will hopefully give you an idea as to why you're getting a HTTP 500
[14:21:26] <GiBy>	 Hi Lcawte, I have this https://histoire-valenciennes-cahv.fr/
[14:22:39] <Lcawte>	 How is your MediaWiki installed/updated?
[14:25:48] <GiBy>	 With FTP
[14:25:58] <Lcawte>	 From the tarball?
[14:26:02] <GiBy>	 Yes
[14:26:32] <Lcawte>	 You seem to be missing some files from the vendor/ directory at a minimum
[14:27:36] <GiBy>	 I tried to update, I did it in 2 steps, first to 1.39 (worked) then 1.43 (failed) . I tried to revert to 1.39 and it bugged
[14:29:43] <Lcawte>	 What failed on 1.43?
[14:31:56] <GiBy>	 It went of error 500
[14:32:40] <Lcawte>	 Okay - did you run the installer/update.php at all on 1.43?
[14:33:10] <Lcawte>	 Presumably the link is now the reverted 1.39?
[14:34:08] <GiBy>	 I did run it.
[14:34:08] <GiBy>	 It should be 1.39
[14:35:54] <GiBy>	 (I also put back the database save of 1.39)
[15:30:51] <Lcawte>	 GiBy I'd download a fresh copy of the tarball and do a fresh 1.39 build (keep your images, LocalSettings.php, skins and extensions) because its looking like you've got lots of mismatched files.
[20:59:18] <Guest54>	 J