Files automated tagging doesn’t work on 20.05 or 20.06

[tevfikceydeliler]

When I fresh Install Ubuntu 20.04 and Nexcloud 20.05 or 20.06 never achieved autotag and file_retention.
When I configure flows like that:

And then Upload *.xlsx file, I see no tag about this extension or MIMEtype (File size and file name rules are working by the way)
Additionalle I get some error log about JS (jsresourceloader):

[jsresourceloader] Error: Could not find resource core/js/systemtags/systemtagscollection.js to load
GET /nextcloud/settings/admin/workflow
from 10.251.15.100 by admin at 2021-01-26T12:01:34+00:00

[jsresourceloader] Error: Could not find resource core/js/systemtags/systemtagmodel.js to load
GET /nextcloud/settings/admin/workflow
from 10.251.15.100 by admin at 2021-01-26T12:01:34+00:00

[jsresourceloader] Error: Could not find resource core/js/systemtags/systemtags.js to load
GET /nextcloud/settings/admin/workflow
from 10.251.15.100 by admin at 2021-01-26T12:01:34+00:00

[jsresourceloader] Error: Could not find resource core/js/oc-backbone-webdav.js to load
GET /nextcloud/settings/admin/workflow
from 10.251.15.100 by admin at 2021-01-26T12:01:34+00:00

I try all the Installation method- manual, appliance and snap- but nothing changes.
I feel really stupid because I cant understand where tose files and why don’t work this app.
I really wonder what I’m missing about reading documents.
IS there anybody run those apps successfully and how?

[j-ed]

I would recommend to double-check the mime-type of an xlsx file using the file command for xlsx files. On my server the command e.g. returns “application/vnd.openxmlformats-officedocument.spreadsheetml.sheet” and not “x-office/spreadsheet”.

file --mime-type <file-name>

[tevfikceydeliler]

It works!
Thank you.