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Right after i login to odoo i get the below error as copied onto the clipboard:



UncaughtClientError > SyntaxError

Uncaught Javascript Error > Unexpected token < in JSON at position 0

SyntaxError: Unexpected token < in JSON at position 0

at JSON.parse ()

at XMLHttpRequest. (https://vidatest\.xyz/web/assets/108\-9a7b0d7/web\.assets_backend\.min\.js:585:55\)


I'm\ on\ centos\ 7/8\ odoo\ version\ 15

\ \ \ \ root@ip\-172\-31\-42\-237:/var/log\#\ systemctl\ status\ odoo

\ \ \ \ ●\ odoo\.service\ \-\ Odoo15

\ \ \ \ \ \ \ \ \ Loaded:\ loaded\ \(/etc/systemd/system/odoo\.service;\ enabled;\ vendor\ preset:\ enabled\)

\ \ \ \ \ \ \ \ \ Active:\ active\ \(running\)\ since\ Wed\ 2022\-04\-06\ 10:26:20\ UTC;\ 6min\ ago

\ \ \ \ \ \ \ Main\ PID:\ 420828\ \(python3\)

\ \ \ \ \ \ \ \ \ \ Tasks:\ 4\ \(limit:\ 4623\)

\ \ \ \ \ \ \ \ \ Memory:\ 138\.1M

\ \ \ \ \ \ \ \ \ CGroup:\ /system\.slice/odoo\.service

\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ └─420828\ /opt/odoo/odoo\-venv/bin/python3\ /opt/odoo/odoo/odoo\-bin\ \-c\ /etc/odoo\.conf\ \-u\ vida_product



Below\ is\ the\ syslog\ that\ seems\ to\ suggest\ all\ is\ good\.



\ \ \ \ Apr\ \ 6\ 10:28:43\ ip\-172\-31\-42\-237\ odoo\[420828\]:\ 2022\-04\-06\ 10:28:43,520\ 420828\ INFO\ vida\ odoo\.addons\.base\.models\.res_users:\ Login\ successful\ for\ db:vida\ login:saif\.kamaal@digiklug\.com\ from\ 127\.0\.0\.1

\ \ \ \ Apr\ \ 6\ 10:28:43\ ip\-172\-31\-42\-237\ odoo\[420828\]:\ 2022\-04\-06\ 10:28:43,538\ 420828\ INFO\ vida\ werkzeug:\ 127\.0\.0\.1\ \-\ \-\ \[06/Apr/2022\ 10:28:43\]\ "POST\ /web/login\ HTTP/1\.0"\ 303\ \-\ 16\ 0\.023\ 0\.072

\ \ \ \ Apr\ \ 6\ 10:28:43\ ip\-172\-31\-42\-237\ odoo\[420828\]:\ 2022\-04\-06\ 10:28:43,677\ 420828\ INFO\ vida\ werkzeug:\ 127\.0\.0\.1\ \-\ \-\ \[06/Apr/2022\ 10:28:43\]\ "GET\ /web\ HTTP/1\.0"\ 200\ \-\ 17\ 0\.007\ 0\.086

\ \ \ \ Apr\ \ 6\ 10:28:44\ ip\-172\-31\-42\-237\ odoo\[420828\]:\ 2022\-04\-06\ 10:28:44,170\ 420828\ INFO\ vida\ werkzeug:\ 127\.0\.0\.1\ \-\ \-\ \[06/Apr/2022\ 10:28:44\]\ "POST\ /web/dataset/call_kw/res\.users/systray_get_activities\ HTTP/1\.0"\ 200\ \-\ 2\ 0\.001\ 0\.005

\ \ \ \ Apr\ \ 6\ 10:28:44\ ip\-172\-31\-42\-237\ odoo\[420828\]:\ 2022\-04\-06\ 10:28:44,178\ 420828\ INFO\ vida\ werkzeug:\ 127\.0\.0\.1\ \-\ \-\ \[06/Apr/2022\ 10:28:44\]\ "GET\ /web/image\?model=res\.users\&field=avatar_128\&id=2\ HTTP/1\.0"\ 304\ \-\ 5\ 0\.003\ 0\.010

\ \ \ \ Apr\ \ 6\ 10:28:44\ ip\-172\-31\-42\-237\ odoo\[420828\]:\ 2022\-04\-06\ 10:28:44,228\ 420828\ INFO\ vida\ werkzeug:\ 127\.0\.0\.1\ \-\ \-\ \[06/Apr/2022\ 10:28:44\]\ "POST\ /web/action/load\ HTTP/1\.0"\ 200\ \-\ 9\ 0\.002\ 0\.005



Below\ is\ the\ Python\ version:



\ \ \ \ python3\ \-\-version

\ \ \ \ Python\ 3\.8\.10

\ \ \ \

\ \ \ \ /usr/bin/pip\ \-\-version

\ \ \ \ pip\ 20\.0\.2\ from\ /usr/lib/python3/dist\-packages/pip\ \(python\ 3\.8\)



Here\ is\ the\ details\ browser\ console\ output\ in\ debug\ mode:



\ \ \ \ POST\ https://vidatest\.xyz/mail/init_messaging\ 405\ \(Not\ Allowed\)

\ \ \ \ POST\ https://vidatest\.xyz/longpolling/poll\ 405\ \(Not\ Allowed\)

\ \ \ \ Uncaught\ SyntaxError:\ Unexpected\ token\
\ \ \ \ \ \ \ \ at\ JSON\.parse\ \(\)

\ \ \ \ \ \ \ \ at\ XMLHttpRequest\.\ \(web\.assets_backend\.min\.js:585:55\)

\ \ \ \ \(anonymous\)\ @\ web\.assets_backend\.min\.js:585

\ \ \ \ load\ \(async\)

\ \ \ \ \(anonymous\)\ @\ web\.assets_backend\.min\.js:583

\ \ \ \ jsonrpc\ @\ web\.assets_backend\.min\.js:582

\ \ \ \ rpc\ @\ web\.assets_backend\.min\.js:590

\ \ \ \ \(anonymous\)\ @\ web\.assets_backend\.min\.js:3324

\ \ \ \ legacyEnv\.session\.rpc\ @\ web\.assets_backend\.min\.js:3323

\ \ \ \ \(anonymous\)\ @\ web\.assets_common\.min\.js:5057

\ \ \ \ rpc\ @\ web\.assets_common\.min\.js:5057

\ \ \ \ _trigger_up\ @\ web\.assets_backend\.min\.js:5924

\ \ \ \ trigger_up\ @\ web\.assets_common\.min\.js:4855

\ \ \ \ call\ @\ web\.assets_common\.min\.js:4908

\ \ \ \ _rpc\ @\ web\.assets_common\.min\.js:4908

\ \ \ \ _makePoll\ @\ web\.assets_backend\.min\.js:5914

\ \ \ \ _poll\ @\ web\.assets_backend\.min\.js:5914

\ \ \ \ startPolling\ @\ web\.assets_backend\.min\.js:5913

\ \ \ \ startPolling\ @\ web\.assets_backend\.min\.js:5893

\ \ \ \ prototype\.\ @\ web\.assets_common\.min\.js:4716

\ \ \ \ _startElection\ @\ web\.assets_backend\.min\.js:5900

\ \ \ \ startPolling\ @\ web\.assets_backend\.min\.js:5890

\ \ \ \ prototype\.\ @\ web\.assets_common\.min\.js:4716

\ \ \ \ \(anonymous\)\ @\ web\.assets_backend\.min\.js:5918

\ \ \ \ trigger\ @\ web\.assets_common\.min\.js:755

\ \ \ \ mounted\ @\ web\.assets_backend\.min\.js:2450

\ \ \ \ __callMounted\ @\ web\.assets_common\.min\.js:1308

\ \ \ \ complete\ @\ web\.assets_common\.min\.js:1230

\ \ \ \ \(anonymous\)\ @\ web\.assets_common\.min\.js:1198

\ \ \ \ flush\ @\ web\.assets_common\.min\.js:1197

\ \ \ \ \(anonymous\)\ @\ web\.assets_common\.min\.js:1202

\ \ \ \ requestAnimationFrame\ \(async\)

\ \ \ \ scheduleTasks\ @\ web\.assets_common\.min\.js:1202

\ \ \ \ start\ @\ web\.assets_common\.min\.js:1191

\ \ \ \ \(anonymous\)\ @\ web\.assets_common\.min\.js:1195

\ \ \ \ addFiber\ @\ web\.assets_common\.min\.js:1193

\ \ \ \ mount\ @\ web\.assets_common\.min\.js:1289

\ \ \ \ mount\ @\ web\.assets_common\.min\.js:1344

\ \ \ \ startWebClient\ @\ web\.assets_backend_prod_only\.min\.js:6

\ \ \ \ await\ in\ startWebClient\ \(async\)

\ \ \ \ \(anonymous\)\ @\ web\.assets_backend_prod_only\.min\.js:3

\ \ \ \ \(anonymous\)\ @\ web\.assets_common\.min\.js:93

\ \ \ \ processJob\ @\ web\.assets_common\.min\.js:93

\ \ \ \ odoo\.processJobs\ @\ web\.assets_common\.min\.js:101

\ \ \ \ \(anonymous\)\ @\ web\.assets_common\.min\.js:94

\ \ \ \ Promise\.then\ \(async\)

\ \ \ \ \(anonymous\)\ @\ web\.assets_common\.min\.js:94

\ \ \ \ processJob\ @\ web\.assets_common\.min\.js:93

\ \ \ \ odoo\.processJobs\ @\ web\.assets_common\.min\.js:101

\ \ \ \ \(anonymous\)\ @\ web\.assets_common\.min\.js:94

\ \ \ \ Promise\.then\ \(async\)

\ \ \ \ \(anonymous\)\ @\ web\.assets_common\.min\.js:94

\ \ \ \ processJob\ @\ web\.assets_common\.min\.js:93

\ \ \ \ odoo\.processJobs\ @\ web\.assets_common\.min\.js:101

\ \ \ \ odoo\.define\ @\ web\.assets_common\.min\.js:79

\ \ \ \ \(anonymous\)\ @\ web.assets_backend_prod_only.min.js:10

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Same error :
UncaughtClientError > SyntaxError
Uncaught Javascript Error > Unexpected token '<', "<html> <h"... is not valid JSON
===

SyntaxError: Unexpected token '<', "<html>
<h"... is not valid JSON
at JSON.parse (<anonymous>)
at XMLHttpRequest.<anonymous> (https://projectx.odoo.com/web/assets/12230-ee9ac54/web.assets_backend.min.js:593:55)

We had this bug when we activated the workers with a longpolling reverse proxy.

any update about this question ??

Best Answer

Chrome extension conflicts can cause this. Disable them one by one to find the one causing the issue. Also, clear the browser cache as an extra step.

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