Hi, I just fixed same issue by renaming share configs on flash drive. See same issue here https://forums.unraid.net/topic/194683-720-can-not-change-primary-storage-for-user-share-to-array/
I also had problem with unaccessible webUI and i fixed it with some changes in docker config.
Check your settings for Container Variable: LAN_NETWORK and maybe VPN_INPUT_PORTS
I have followed this https://github.com/binhex/documentation/blob/master/docker/faq/vpn.md