The following error occurs when trying to install a new plugin
Error: [name of new jail] had a failure Exception: RuntimeError Message: Stopped syncthing2 due to VNET failure Partial plugin destroyed
I tried all workarounds I could find:
1) DNS 188.8.131.52 and 184.108.40.206
2) No MTU is set
3) Disabled all other network adapters so that there is only one bridge
4) Disabled hardware offloading for the network
My old 11.2-based jails still work [but can not be migrated to 11.3 due to another error that has no solution], so I do not know what to do anymore. Please help me.