all out Jomsocial Sites are an absolute mess after J4 upgrade
basic links are broken - like groups etc. I would like some to review what I send and FIX things - I cant try ever single link to trouble shoot your jomsocial mess of link failures
IE this is a good link represented by the the Green Arrow in the image ( hello me plugin )
https://condodcc56.com/community/4746-condo-dcc-56-admin/groups
Image has red arrow of the BAD link that is from the Standard Profile Groups link
IMAGE : https://prnt.sc/ohbMs4G9Pxdu
Note : all 3 of groups shown in the image DO NOT WORK
Do you have someone to discuss this because this is a Multi site Master. / Slave site setup.