The folders are in a remote file system mounted via sshfs. When I open FileManger in Cloudron, I don't see a file tree. So no folders at all. But also don't see problems when operating in nextcloud.
When I open that drive with my SFTP-Software, I can see all folders and all show same rights and owner.

Back at cloudron file manager, when I open a different Volume, which is a different Folder mounted from the same drive, I can see the containing folders.

During "Path not found: /username" there is nothing happening in the postgres logs.
But when "Exception during scan: ..." appears in the terminal, postgress logs shows this:

May 08 10:20:142024-05-08 08:20:14.180 UTC [166] user7826f9bec6084e53af12181aa87f33e2@db7826f9bec6084e53af12181aa87f33e2 ERROR: invalid byte sequence for encoding "UTF8": 0xe4 0x63 0x68
May 08 10:20:142024-05-08 08:20:14.180 UTC [166] user7826f9bec6084e53af12181aa87f33e2@db7826f9bec6084e53af12181aa87f33e2 CONTEXT: unnamed portal parameter $8
May 08 10:20:142024-05-08 08:20:14.180 UTC [166] user7826f9bec6084e53af12181aa87f33e2@db7826f9bec6084e53af12181aa87f33e2 STATEMENT: INSERT INTO "oc_filecache" ("mimepart", "mimetype", "mtime", "size", "etag", "storage_mtime", "permissions", "name", "parent", "checksum", "path_hash", "path", "storage") VALUES($1, $2, $3, $4, $5, $6, $7, $8, $9, $10, $11, $12, $13)
May 08 10:20:142024-05-08 08:20:14.185 UTC [166] user7826f9bec6084e53af12181aa87f33e2@db7826f9bec6084e53af12181aa87f33e2 ERROR: current transaction is aborted, commands ignored until end of transaction block
May 08 10:20:142024-05-08 08:20:14.185 UTC [166] user7826f9bec6084e53af12181aa87f33e2@db7826f9bec6084e53af12181aa87f33e2 STATEMENT: INSERT INTO "oc_filecache" ("mimepart", "mimetype", "mtime", "size", "etag", "storage_mtime", "permissions", "name", "parent", "checksum", "path_hash", "path", "storage") VALUES($1, $2, $3, $4, $5, $6, $7, $8, $9, $10, $11, $12, $13)
May 08 10:20:142024-05-08 08:20:14.187 UTC [166] user7826f9bec6084e53af12181aa87f33e2@db7826f9bec6084e53af12181aa87f33e2 ERROR: current transaction is aborted, commands ignored until end of transaction block
May 08 10:20:142024-05-08 08:20:14.187 UTC [166] user7826f9bec6084e53af12181aa87f33e2@db7826f9bec6084e53af12181aa87f33e2 STATEMENT: INSERT INTO "oc_filecache" ("mimepart", "mimetype", "mtime", "size", "etag", "storage_mtime", "permissions", "name", "parent", "checksum", "path_hash", "path", "storage") VALUES($1, $2, $3, $4, $5, $6, $7, $8, $9, $10, $11, $12, $13)
May 08 10:20:142024-05-08 08:20:14.189 UTC [166] user7826f9bec6084e53af12181aa87f33e2@db7826f9bec6084e53af12181aa87f33e2 ERROR: current transaction is aborted, commands ignored until end of transaction block
May 08 10:20:142024-05-08 08:20:14.189 UTC [166] user7826f9bec6084e53af12181aa87f33e2@db7826f9bec6084e53af12181aa87f33e2 STATEMENT: SELECT "filecache"."fileid", "storage", "path", "path_hash", "filecache"."parent", "filecache"."name", "mimetype", "mimepart", "size", "mtime", "storage_mtime", "encrypted", "etag", "filecache"."permissions", "checksum", "unencrypted_size", "metadata_etag", "creation_time", "upload_time", "meta"."json" AS "meta_json", "meta"."sync_token" AS "meta_sync_token" FROM "oc_filecache" "filecache" LEFT JOIN "oc_filecache_extended" "fe" ON "filecache"."fileid" = "fe"."fileid" LEFT JOIN "oc_files_metadata" "meta" ON "filecache"."fileid" = "meta"."file_id" WHERE ("storage" = $1) AND ("path_hash" = $2)
May 08 10:20:142024-05-08 08:20:14.190 UTC [166] user7826f9bec6084e53af12181aa87f33e2@db7826f9bec6084e53af12181aa87f33e2 ERROR: current transaction is aborted, commands ignored until end of transaction block
May 08 10:20:142024-05-08 08:20:14.190 UTC [166] user7826f9bec6084e53af12181aa87f33e2@db7826f9bec6084e53af12181aa87f33e2 STATEMENT: SELECT "uid", "displayname", "password" FROM "oc_users" WHERE "uid_lower" = $1

Years ago I migrated this nextcloud from a vserver to a nextcloud within cloudron.
Therefore I converted the database from mysql and imported to nextcloud. Maybe relicts?

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