Hi AndresC2
You are welcome. Thanks for confirming that fixed it.
I just ran modinfo on conntrack:
tc@E310:~/x$ modinfo  /usr/local/lib/modules/4.19.10-tinycore64/kernel/net/netfilter/nf_conntrack.ko.gz
filename:       /usr/local/lib/modules/4.19.10-tinycore64/kernel/net/netfilter/nf_conntrack.ko.gz
license:        GPL
parm:           nf_conntrack_helper:Enable automatic conntrack helper assignment (default 0)
parm:           acct:Enable connection tracking flow accounting.
parm:           tstamp:Enable connection tracking flow timestamping.
alias:          nf_conntrack-10
alias:          nf_conntrack-2
alias:          ip_conntrack
depends:        nf_defrag_ipv6,nf_defrag_ipv4
intree:         Y
vermagic:       4.19.10-tinycore64 SMP mod_unload 
tc@E310:~/x$
nf_defrag_ipv6  is provided by  ipv6-KERNEL.tcz  so it looks like  ipv6-KERNEL.tcz  should be added to  netfilter-KERNEL.tcz.dep.