I got this message once while trying to reply to an smail, but it didn't come back. Now it comes up every time I try to create a topic in our private rp-planning forum! I included the message below. And now, going back to the forum, it created multiples of my topic!
Error Message
Fatal error: Uncaught exception 'GuzzleHttpExceptionClientException' with message 'Client error: 404' in /www/subeta.net/vendor/guzzlehttp/guzzle/src/Middleware.php:69 Stack trace: /www/subeta.net/vendor/guzzlehttp/promises/src/Promise.php(199): GuzzleHttpMiddleware::GuzzleHttp{closure}(Object(GuzzleHttpPsr7Response)) /www/subeta.net/vendor/guzzlehttp/promises/src/Promise.php(152): GuzzleHttpPromisePromise::callHandler(1, Object(GuzzleHttpPsr7Response), Array) /www/subeta.net/vendor/guzzlehttp/promises/src/TaskQueue.php(60): GuzzleHttpPromisePromise::GuzzleHttpPromise{closure}() /www/subeta.net/vendor/guzzlehttp/guzzle/src/Handler/CurlMultiHandler.php(96): GuzzleHttpPromiseTaskQueue->run() /www/subeta.net/vendor/guzzlehttp/guzzle/src/Handler/CurlMultiHandler.php(123): GuzzleHttpHandlerCurlMultiHandler->tick() /www/subeta.net/vendor/guzzlehttp/promises/src/Promise.php(240): GuzzleHttpHandlerCurlMultiHandler->execute(true) /www/subeta.net/vendor/guzzlehttp/promises/src/Promise.php(21 in /www/subeta.net/vendor/guzzlehttp/guzzle/src/Middleware.php on line 69
I'm getting this same (or really similar looking) fatal error message when I try to send an item to a friend, or post a comment on their page.
I actually got all your messages! :P
Oh, that´s great! I saw you tried to create a second thread yet with errors, too?

Yes, it kept giving me the error message but when I went to the forum there were multiples of my post! =.='
Hopefully, stuff sees this pretty quickly, it´s hard to work when we can´t communicate there, LOL

ditto to this error..
Plus my forum posts aren't showing up now either, and it says I can't post twice in a row..so I know they went through. Also my Group Pings aren't working :(
I thought it was just me...
Love may not always be destiny, But a Gift.

Same here no reply to friend messages I first noticed it when I was trying to stick a sticker -_-

got this one while responding to a comment...I got an alert I got a comment, but nothing showed up.
error
Fatal error: Uncaught exception 'GuzzleHttpExceptionClientException' with message 'Client error: 404' in /www/subeta.net/vendor/guzzlehttp/guzzle/src/Middleware.php:69 Stack trace: /www/subeta.net/vendor/guzzlehttp/promises/src/Promise.php(199): GuzzleHttpMiddleware::GuzzleHttp{closure}(Object(GuzzleHttpPsr7Response)) /www/subeta.net/vendor/guzzlehttp/promises/src/Promise.php(152): GuzzleHttpPromisePromise::callHandler(1, Object(GuzzleHttpPsr7Response), Array) /www/subeta.net/vendor/guzzlehttp/promises/src/TaskQueue.php(60): GuzzleHttpPromisePromise::GuzzleHttpPromise{closure}() /www/subeta.net/vendor/guzzlehttp/guzzle/src/Handler/CurlMultiHandler.php(96): GuzzleHttpPromiseTaskQueue->run() /www/subeta.net/vendor/guzzlehttp/guzzle/src/Handler/CurlMultiHandler.php(123): GuzzleHttpHandlerCurlMultiHandler->tick() /www/subeta.net/vendor/guzzlehttp/promises/src/Promise.php(240): GuzzleHttpHandlerCurlMultiHandler->execute(true) /www/subeta.net/vendor/guzzlehttp/promises/src/Promise.php(21 in /www/subeta.net/vendor/guzzlehttp/guzzle/src/Middleware.php on line 69