问题描述（报错内容）：
显示初始的文本错误信息
`Warning: file_put_contents(/www/wwwroot/flarum/public/assets/forum.js): failed to open stream: Permission denied in /www/wwwroot/flarum/vendor/league/flysystem/src/Adapter/Local.php on line 199
Warning: file_put_contents(/www/wwwroot/flarum/public/assets/forum.js.map): failed to open stream: Permission denied in /www/wwwroot/flarum/vendor/league/flysystem/src/Adapter/Local.php on line 199
Warning: file_put_contents(/www/wwwroot/flarum/public/assets/rev-manifest.json): failed to open stream: Permission denied in /www/wwwroot/flarum/vendor/league/flysystem/src/Adapter/Local.php on line 199
Warning: file_put_contents(/www/wwwroot/flarum/public/assets/forum-zh-Hans.js): failed to open stream: Permission denied in /www/wwwroot/flarum/vendor/league/flysystem/src/Adapter/Local.php on line 199
Warning: file_put_contents(/www/wwwroot/flarum/public/assets/forum-zh-Hans.js.map): failed to open stream: Permission denied in /www/wwwroot/flarum/vendor/league/flysystem/src/Adapter/Local.php on line 199
Warning: file_put_contents(/www/wwwroot/flarum/public/assets/rev-manifest.json): failed to open stream: Permission denied in /www/wwwroot/flarum/vendor/league/flysystem/src/Adapter/Local.php on line 199
Fatal error: Uncaught UnexpectedValueException: The stream or file “/www/wwwroot/flarum/storage/logs/flarum-2026-01-02.log” could not be opened in append mode: failed to open stream: Permission denied in /www/wwwroot/flarum/vendor/monolog/monolog/src/Monolog/Handler/StreamHandler.php:115 Stack trace: #0 /www/wwwroot/flarum/vendor/monolog/monolog/src/Monolog/Handler/RotatingFileHandler.php(120): Monolog\Handler\StreamHandler->write() #1 /www/wwwroot/flarum/vendor/monolog/monolog/src/Monolog/Handler/AbstractProcessingHandler.php(39): Monolog\Handler\RotatingFileHandler->write() #2 /www/wwwroot/flarum/vendor/monolog/monolog/src/Monolog/Logger.php(344): Monolog\Handler\AbstractProcessingHandler->handle() #3 /www/wwwroot/flarum/vendor/monolog/monolog/src/Monolog/Logger.php(712): Monolog\Logger->addRecord() #4 /www/wwwroot/flarum/vendor/flarum/core/src/Foundation/ErrorHandling/LogReporter.php(32): Monolog\Logger->error() #5 /www/wwwroot/flarum/vendor/flarum/core/src/Http/Middleware/HandleErrors.php(63): Flarum\Foundation\ErrorH in /www/wwwroot/flarum/vendor/monolog/monolog/src/Monolog/Handler/StreamHandler.php on line 115`
已尝试的解决办法（演示网址或图片）
将文件目录全部设置为777权限（原本为775）。错误信息变更为如下：
`Warning: DOMXPath::evaluate(): Invalid type in /www/wwwroot/flarum/storage/formatter/Renderer_7d6abffda0bd7512071acfd70df4f4da7f502b9d.php on line 13
Fatal error: Uncaught Laminas\HttpHandlerRunner\Exception\EmitterException: Output has been emitted previously; cannot emit response in /www/wwwroot/flarum/vendor/laminas/laminas-httphandlerrunner/src/Exception/EmitterException.php:24 Stack trace: #0 /www/wwwroot/flarum/vendor/laminas/laminas-httphandlerrunner/src/Emitter/SapiEmitterTrait.php(40): Laminas\HttpHandlerRunner\Exception\EmitterException::forOutputSent() #1 /www/wwwroot/flarum/vendor/laminas/laminas-httphandlerrunner/src/Emitter/SapiEmitter.php(27): Laminas\HttpHandlerRunner\Emitter\SapiEmitter->assertNoPreviousOutput() #2 /www/wwwroot/flarum/vendor/laminas/laminas-httphandlerrunner/src/RequestHandlerRunner.php(98): Laminas\HttpHandlerRunner\Emitter\SapiEmitter->emit() #3 /www/wwwroot/flarum/vendor/flarum/core/src/Http/Server.php(45): Laminas\HttpHandlerRunner\RequestHandlerRunner->run() #4 /www/wwwroot/flarum/public/index.php(26): Flarum\Http\Server->listen() #5 {main} thrown in /www/wwwroot/flarum/vendor/laminas/laminas-httphandlerrunner/src/Exception/EmitterException.php on line 24`
设备信息
系统版本：Ubuntu 22.04.4 LTS
应用版本：PHP 7.4.33 MySQL 5.7.43 Nginx 1.28.0
PHP安装拓展：
Core
date
libxml
openssl
pcre
sqlite3
zlib
bcmath
ctype
curl
dom
filter
ftp
gd
gettext
hash
iconv
intl
json
mbstring
SPL
session
pcntl
standard
PDO
mysqlnd
pdo_sqlite
Phar
posix
Reflection
pdo_mysql
shmop
SimpleXML
soap
sockets
sodium
mysqli
sysvsem
tokenizer
xml
xmlreader
xmlrpc
xmlwriter
zip
fileinfo
exif
PHP解禁函数：参照站内教程
错误出现前动作：发布新主题（帖子），内容为一段bilibili的链接，以测试插件
网站安装插件：无新装动作，均为安装已久的插件，composer部署正常
Flarum版本：通过composer安装的最新版
服务器位置：香港（网络对大陆优化）
已开启debug模式，内容为该模式下获取的。求助各位大神，望给出方案，如有其他要补充，敬请跟贴询问
感激不尽！