文件管理器打不开的问题

我使用内网进入服务器就可以打开文件管理器

而使用内网穿透进入服务器就不可打开文件管理器，并提示SFTP session failed to allocate
请问我该怎么解决呢

The report names only the file manager and the “SFTP session failed to allocate” message; no source file, test, or entry point is identified. Start by reproducing the difference between direct intranet access and access through the tunnel, then trace the SFTP allocation failure and verify that the file manager opens through both paths.

Written by the indexing model from the issue text.