Can't connect to webinterface of tvheadend

Hello,
i hope you can help me.
I have pulled the TV headend Server via Portainer on my pi with this config:

image: lscr.io/linuxserver/tvheadend:latest
    container_name: tvheadend
    environment:
      - PUID=1000
      - PGID=1000
      - TZ=Europe/Berlin
    volumes:
      -  /var/lib/docker/volumes/Tv-Headend/ :/config
      - /media/USBdrive/ncdata/ncp/files/TV_Aufnahmen:/recordings
    ports:
      - 9981:9981
      - 9982:9982
    devices:
      - /dev/dvb:/dev/dvb 
    restart: unless-stopped

Evering semes fine but the webinterface isn’t showing up.

When i go to logs in Portainer it seems also OK:


[cont-init.d] 30-config: executing... 
,Setting permissions
,[cont-init.d] 30-config: exited 0.
,[cont-init.d] 50-gid-video: executing... 
,[cont-init.d] 50-gid-video: exited 0.
,[cont-init.d] 90-custom-folders: executing... 
,[cont-init.d] 90-custom-folders: exited 0.
,[cont-init.d] 99-custom-files: executing... 
,[custom-init] no custom files found exiting...
,[cont-init.d] 99-custom-files: exited 0.
,[cont-init.d] done.
,[services.d] starting services
,[services.d] done.
,2022-02-26 09:54:06.488 [   INFO] main: Log started
,2022-02-26 09:54:06.488 [   INFO] http: Starting HTTP server 0.0.0.0:9981
,2022-02-26 09:54:06.488 [   INFO] htsp: Starting HTSP server 0.0.0.0:9982
,2022-02-26 09:54:06.492 [   INFO] config: loaded
,2022-02-26 09:54:06.492 [   INFO] config: scanfile (re)initialization with path <none>
,2022-02-26 09:54:06.493 [   INFO] transcode: 'video' context type registered
,2022-02-26 09:54:06.493 [   INFO] transcode: 'audio' context type registered
,2022-02-26 09:54:06.493 [   INFO] transcode: '&TVHH264Decoder' decoder helper registered
,2022-02-26 09:54:06.493 [   INFO] transcode: '&TVHTHEORADecoder' decoder helper registered
,2022-02-26 09:54:06.493 [   INFO] transcode: '&TVHAACDecoder' decoder helper registered
,2022-02-26 09:54:06.493 [   INFO] transcode: '&TVHVORBISDecoder' decoder helper registered
,2022-02-26 09:54:06.493 [   INFO] transcode: '&TVHOPUSDecoder' decoder helper registered
,2022-02-26 09:54:06.493 [   INFO] transcode: '&TVHMPEG2VIDEOEncoder' encoder helper registered
,2022-02-26 09:54:06.493 [   INFO] transcode: '&TVHH264Encoder' encoder helper registered
,2022-02-26 09:54:06.493 [   INFO] transcode: '&TVHHEVCEncoder' encoder helper registered
,2022-02-26 09:54:06.493 [   INFO] transcode: '&TVHAACEncoder' encoder helper registered
,2022-02-26 09:54:06.494 [   INFO] codec: 'mpeg2video' encoder registered
,2022-02-26 09:54:06.494 [   INFO] codec: 'mp2' encoder registered
,2022-02-26 09:54:06.494 [   INFO] codec: 'aac' encoder registered
,2022-02-26 09:54:06.494 [   INFO] codec: 'vorbis' encoder registered
,2022-02-26 09:54:06.494 [   INFO] codec: 'flac' encoder registered
,2022-02-26 09:54:06.494 [   INFO] codec: 'libx264' encoder registered
,2022-02-26 09:54:06.494 [   INFO] codec: 'libx265' encoder registered
,2022-02-26 09:54:06.494 [   INFO] codec: 'libvpx' encoder registered
,2022-02-26 09:54:06.494 [   INFO] codec: 'libvpx-vp9' encoder registered
,2022-02-26 09:54:06.494 [   INFO] codec: 'libtheora' encoder registered
,2022-02-26 09:54:06.494 [   INFO] codec: 'libvorbis' encoder registered
,2022-02-26 09:54:06.494 [   INFO] codec: 'libopus' encoder registered
,2022-02-26 09:54:06.495 [   INFO] codec: 'webtv-h264' codec profile created
,2022-02-26 09:54:06.495 [   INFO] codec: 'webtv-vorbis' codec profile created
,2022-02-26 09:54:06.495 [   INFO] codec: 'webtv-vp8' codec profile created
,2022-02-26 09:54:06.495 [   INFO] codec: 'webtv-aac' codec profile created
,2022-02-26 09:54:06.500 [   INFO] descrambler: adding CAID 2600/FFFF as ConstCW interval 10000ms pc 20 ep default (BISS)
,2022-02-26 09:54:06.500 [   INFO] descrambler: adding CAID 0E00/FFFF as MultiPID interval 1000ms pc 2 ep default (PowerVu)
,2022-02-26 09:54:06.502 [   INFO] iptv: Using 2 input thread(s)
,2022-02-26 09:54:06.511 [   INFO] linuxdvb: adapter added /dev/dvb/adapter0
,2022-02-26 09:54:06.513 [   INFO] dvr: Creating new configuration ''
,2022-02-26 09:54:06.516 [   INFO] epggrab: module uk_freesat created
,2022-02-26 09:54:06.516 [   INFO] epggrab: module uk_freesat_eit created
,2022-02-26 09:54:06.516 [   INFO] epggrab: module uk_freeview created
,2022-02-26 09:54:06.516 [   INFO] epggrab: module nz_freeview2 created
,2022-02-26 09:54:06.516 [   INFO] epggrab: module nz_freeview1 created
,2022-02-26 09:54:06.516 [   INFO] epggrab: module viasat_baltic created
,2022-02-26 09:54:06.516 [   INFO] epggrab: module Bulsatcom_39E created
,2022-02-26 09:54:06.516 [   INFO] epggrab: module uk_cable_virgin created
,2022-02-26 09:54:06.516 [   INFO] epggrab: module eit created
,2022-02-26 09:54:06.516 [   INFO] epggrab: module psip created
,2022-02-26 09:54:06.528 [   INFO] epggrab: module opentv-ausat created
,2022-02-26 09:54:06.529 [   INFO] epggrab: module opentv-skyuk created
,2022-02-26 09:54:06.529 [   INFO] epggrab: module opentv-skynz created
,2022-02-26 09:54:06.529 [   INFO] epggrab: module opentv-skyit created
,2022-02-26 09:54:06.531 [   INFO] epggrab: module xmltv created
,2022-02-26 09:54:06.535 [   INFO] spawn: Executing "/usr/bin/tv_find_grabbers"
,2022-02-26 09:54:06.971 [   INFO] scanfile: DVB-S - loaded 1 regions with 115 networks
,2022-02-26 09:54:06.971 [   INFO] scanfile: DVB-T - loaded 44 regions with 1124 networks
,2022-02-26 09:54:06.971 [   INFO] scanfile: DVB-C - loaded 19 regions with 64 networks
,2022-02-26 09:54:06.971 [   INFO] scanfile: ATSC-T - loaded 2 regions with 12 networks
,2022-02-26 09:54:06.971 [   INFO] scanfile: ATSC-C - loaded 1 regions with 5 networks
,2022-02-26 09:54:06.971 [   INFO] scanfile: ISDB-T - loaded 2 regions with 1297 networks
,2022-02-26 09:54:11.923 [   INFO] epggrab: module /usr/bin/tv_grab_wg created
,2022-02-26 09:54:11.923 [   INFO] epggrab: module /usr/bin/tv_grab_file created
,2022-02-26 09:54:11.923 [   INFO] epggrab: module /usr/bin/tv_grab_ch_search created
,2022-02-26 09:54:11.923 [   INFO] epggrab: module /usr/bin/tv_grab_uk_tvguide created
,2022-02-26 09:54:11.923 [   INFO] epggrab: module /usr/bin/tv_grab_na_dtv created
,2022-02-26 09:54:11.923 [   INFO] epggrab: module /usr/bin/tv_grab_eu_epgdata created
,2022-02-26 09:54:11.923 [   INFO] epggrab: module /usr/bin/tv_grab_zz_sdjson created
,2022-02-26 09:54:11.923 [   INFO] epggrab: module /usr/bin/tv_grab_huro created
,2022-02-26 09:54:11.923 [   INFO] epggrab: module /usr/bin/tv_grab_na_dd created
,2022-02-26 09:54:11.923 [   INFO] epggrab: module /usr/bin/tv_grab_combiner created
,2022-02-26 09:54:11.923 [   INFO] epggrab: module /usr/bin/tv_grab_tr created
,2022-02-26 09:54:11.923 [   INFO] epggrab: module /usr/bin/tv_grab_zz_sdjson_sqlite created
,2022-02-26 09:54:11.923 [   INFO] epggrab: module /usr/bin/tv_grab_na_tvmedia created
,2022-02-26 09:54:11.923 [   INFO] epggrab: module /usr/bin/tv_grab_ar created
,2022-02-26 09:54:11.923 [   INFO] epggrab: module /usr/bin/tv_grab_fi_sv created
,2022-02-26 09:54:11.923 [   INFO] epggrab: module /usr/bin/tv_grab_eu_xmltvse created
,2022-02-26 09:54:11.923 [   INFO] epggrab: module /usr/bin/tv_grab_fr created
,2022-02-26 09:54:11.923 [   INFO] epggrab: module /usr/bin/tv_grab_fi created
,2022-02-26 09:54:11.923 [   INFO] epggrab: module /usr/bin/tv_grab_it created
,2022-02-26 09:54:11.923 [   INFO] epggrab: module /usr/bin/tv_grab_is created
,2022-02-26 09:54:11.924 [   INFO] tbl-eit: module eit - scraper disabled by config
,2022-02-26 09:54:11.925 [   INFO] epgdb: gzip format detected, inflating (ratio 138.6% deflated size 79)
,2022-02-26 09:54:11.925 [   INFO] epgdb: parsing 57 bytes
,2022-02-26 09:54:11.925 [   INFO] epgdb: loaded v3
,2022-02-26 09:54:11.925 [   INFO] epgdb:   config     1
,2022-02-26 09:54:11.925 [   INFO] epgdb:   broadcasts 0
,2022-02-26 09:54:11.926 [   INFO] dvr: Purging obsolete autorec entries for current schedule
,2022-02-26 09:54:11.926 [ NOTICE] START: HTS Tvheadend version 4.3-2008~ge2ae8f4eb started, running as PID:371 UID:1000 GID:1000, CWD:/run/s6/services/tvheadend CNF:/config
,

can you see my mistake?
Thanks for your Help.

P.S. i also tried the release-4.2 in en other docker container and get the same resault.