Using Odoo 16, I am trying to access the user menu from setting (under users and groups). 

This results in the following message:

UncaughtPromiseError
Uncaught Promise > Missing field string information for the field 'sel_groups_35_36_88' from the 'res.users' model
Error: Missing field string information for the field 'sel_groups_35_36_88' from the 'res.users' model
processArch/https://odoo\.xxxx\.xx/web/assets/8003\-0488dac/web\.assets_backend\.min\.js:6623:258
traverse@https://odoo\.xxxx\.xx/web/assets/8003\-0488dac/web\.assets_backend\.min\.js:6618:201
traverse/https://odoo\.xxxx\.xx/web/assets/8003\-0488dac/web\.assets_backend\.min\.js:6618:250
each@https://odoo\.xxxx\.xx/web/assets/8002\-955cc1b/web\.assets_common\.min\.js:173:157
traverse@https://odoo\.xxxx\.xx/web/assets/8003\-0488dac/web\.assets_backend\.min\.js:6618:211
traverse/https://odoo\.xxxx\.xx/web/assets/8003\-0488dac/web\.assets_backend\.min\.js:6618:250
each@https://odoo\.xxxx\.xx/web/assets/8002\-955cc1b/web\.assets_common\.min\.js:173:157
traverse@https://odoo\.xxxx\.xx/web/assets/8003\-0488dac/web\.assets_backend\.min\.js:6618:211
traverse/https://odoo\.xxxx\.xx/web/assets/8003\-0488dac/web\.assets_backend\.min\.js:6618:250
each@https://odoo\.xxxx\.xx/web/assets/8002\-955cc1b/web\.assets_common\.min\.js:173:157
traverse@https://odoo\.xxxx\.xx/web/assets/8003\-0488dac/web\.assets_backend\.min\.js:6618:211
traverse/https://odoo\.xxxx\.xx/web/assets/8003\-0488dac/web\.assets_backend\.min\.js:6618:250
each@https://odoo\.xxxx\.xx/web/assets/8002\-955cc1b/web\.assets_common\.min\.js:173:157
traverse@https://odoo\.xxxx\.xx/web/assets/8003\-0488dac/web\.assets_backend\.min\.js:6618:211
traverse/https://odoo\.xxxx\.xx/web/assets/8003\-0488dac/web\.assets_backend\.min\.js:6618:250
each@https://odoo\.xxxx\.xx/web/assets/8002\-955cc1b/web\.assets_common\.min\.js:173:157
traverse@https://odoo\.xxxx\.xx/web/assets/8003\-0488dac/web\.assets_backend\.min\.js:6618:211
traverse/https://odoo\.xxxx\.xx/web/assets/8003\-0488dac/web\.assets_backend\.min\.js:6618:250
each@https://odoo\.xxxx\.xx/web/assets/8002\-955cc1b/web\.assets_common\.min\.js:173:157
traverse@https://odoo\.xxxx\.xx/web/assets/8003\-0488dac/web\.assets_backend\.min\.js:6618:211
processArch@https://odoo\.xxxx\.xx/web/assets/8003\-0488dac/web\.assets_backend\.min\.js:6622:188
generateLegacyLoadViewsResult@https://odoo\.xxxx\.xx/web/assets/8003\-0488dac/web\.assets_backend\.min\.js:6620:117
start/loadViews/cache\[key\]https://odoo.xxxx.xx/web/assets/8003-0488dac/web.assets_backend.min.js:5657:447

I tried to locate the field in question but wasn't able to. I was facing a similar issue a couple of weeks ago as well and opened a support ticket, but the issue resolved itself after a couple of days before they got back to me.

Thanks for any help.