尝试添加带有嵌入式图形的帖子时收到了一条错误消息。似乎存在文件保护问题，建议执行以下操作：
./launcher rebuild app
我执行了该命令，并收到以下错误：
FAILED
--------------------
Pups::ExecError: cd /var/www/discourse && su discourse -c 'bundle exec rake themes:update assets:precompile' failed with return #<Process::Status: pid 515 exit 1>
Location of failure: /usr/local/lib/ruby/gems/2.7.0/gems/pups-1.1.1/lib/pups/exec_command.rb:117:in `spawn'
exec failed with the params {"cd"=>"$home", "hook"=>"assets_precompile", "cmd"=>["su discourse -c 'bundle exec rake themes:update assets:precompile'"]}
bootstrap failed with exit code 1
** FAILED TO BOOTSTRAP ** please scroll up and look for earlier error messages, there may be more than one.
./discourse-doctor may help diagnose the problem.
5c01a6b7b892f68e51e8f275b360af36d7b6f0ac8a3e22c837b0afaaef1705f4
这个错误有点令人费解。这会在大约五分钟后出现。问题是我的数据在 /var/discourse 而不是 /var/www/discourse。我上次备份是一个月前，我想修复这个问题，而不是丢失上个月的数据。有什么想法吗？是否有可能在无法重建的系统上备份数据库，然后以某种方式在备份上恢复数据库？
还有一个更早的错误：“预格式化文本”
warning Skipping preferred cache folder "/home/discourse/.cache/yarn" because it is not writable.
warning Selected the next writable cache folder in the list, will be "/tmp/.yarn-cache-1000".
warning Cannot find a suitable global folder. Tried these: "/usr/local, /home/discourse/.yarn"
node:fs:1336
handleErrorFromBinding(ctx);
^
Error: EACCES: permission denied, mkdir '/home/discourse/.config/configstore'
You don't have access to this file.
at Object.mkdirSync (node:fs:1336:3)
at AsyncFunction.module.exports.sync (/var/www/discourse/app/assets/javascripts/node_modules/make-dir/index.js:114:6)
at Configstore.set all [as all] (/var/www/discourse/app/assets/javascripts/node_modules/configstore/index.js:59:12)
at Configstore.set (/var/www/discourse/app/assets/javascripts/node_modules/configstore/index.js:91:12)
at clientId (/var/www/discourse/app/assets/javascripts/node_modules/ember-cli/lib/cli/index.js:55:17)
at module.exports (/var/www/discourse/app/assets/javascripts/node_modules/ember-cli/lib/cli/index.js:105:13)
at Object.<anonymous> (/var/www/discourse/app/assets/javascripts/node_modules/ember-cli/bin/ember:34:1)
at Module._compile (node:internal/modules/cjs/loader:1103:14)
at Object.Module._extensions..js (node:internal/modules/cjs/loader:1157:10)
at Module.load (node:internal/modules/cjs/loader:981:32) {
errno: -13,
根本没有 /home/discourse 文件夹。