I can either escalate you to a ticket and that will take a bit to get you support as we are backed up or you and I can try some basic troubleshooting steps. ^TK
I'm gonna have you both sign all the way out of your Microsoft Accounts and sign back in. May be worth resetting both your routers (just to rule it out as a connection issue)
Please back up any single player worlds: bit.ly/3jiNA8W ^TK
I was going to say to reach out to the owner but since you are the owner, there isn't much support we can offer as custom texture packs isn't something we have troubleshooting steps for in support. ^TK
Yea, of course! Unfortunately, if you're not able to load in and it's getting stuck, that's usually a sign of corruption since single players worlds are stored locally. ^TK
Switching over to a more stable connection could help but the account information is what we need to help you with. You will need to get in touch with Xbox/Microsoft Support for assistance. nitter.vloup.ch/xboxsupport or support.xbox.com ^TK
Is this on a Realm and do you happen to have a backup of the World? If not, then this may be corruption or an interrupted connection to the server. ^TK
So you'll need to continue working with the agent when they get to your ticket for help. We're not able to do anything from our Social Media Support for accounts. ^TK
To keep your information secure, please complete our request form at aka.ms/Minecraft-Support so we can quickly and safely assist with your question! ^TK
We're unable to comment on any future updates or features that are not publicly known at this time. All available info on game updates can be found in this FAQ: help.minecraft.net/hc/en-us/… ^TK
What troubleshooting steps have you tried and what platform do you happen to be playing on? Is it something you can hook up to a hardwire connection? ^TK
I'm gonna send you up to our Realms team! I would try a couple more times of uploading the World though. To keep your information secure, please complete our request form at aka.ms/Minecraft-Support so we can quickly and safely assist with your question! ^TK